SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


SCHEDULE 13D

Under the Securities Exchange Act of 1934



Digital Insight Corporation
(Name of Issuer)

Common Stock (par value $0.001)
(Title of Class of Securities)



25385P106
(CUSIP Number)

James E. McKee
GAMCO Investors, Inc.
One Corporate Center
Rye, New York 10580-1435
(914) 921-5294
(Name, Address and Telephone Number of Person Authorized to Receive Notices
and Communications)


December 18, 2006
(Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is
filing this schedule because of Section 240.13d-1(e), 240.13d-1(f)
or 240.13d-1(g), check the following box.



















CUSIP No.  25385P106

1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Funds, LLC
	I.D. NO.  13-4044523
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
 00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

180,000  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

180,000  (Item 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

180,000  (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.56%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA
CUSIP No.  25385P106

1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

GAMCO Asset Management Inc.
	 I.D. NO.  13-4044521
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)



(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
 00-Funds of investment advisory clients

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

1,138,304  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

1,138,304  (Item 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,138,304  (Item 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

3.51%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IA, CO
CUSIP No.  25385P106

1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

MJG Associates, Inc.
	I.D. NO.  06-1304269
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY


4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
 00-Client Funds

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   Connecticut

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

 16,000  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

16,000  (Item 5)

10




SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

16,000  (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
 (SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.05%
14


TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    CO
CUSIP No.  25385P106

1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Foundation, Inc.
	            I.D. NO.  94-2975159
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
WC

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   NV

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

25,000      (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

25,000        (Item 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 25,000              (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.08%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    00-PRIVATE FOUNDATION

CUSIP No. 25385P106

1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli & Company, Inc.
	I.D. NO.  13-2885006
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
WC

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

 20,000     (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

  20,000      (Item 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  20,000            (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.06%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    BD, CO

CUSIP No.  25385P106
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Gabelli Securities, Inc.
	I.D. NO.  13-3379374
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
SOURCE OF FUNDS (SEE INSTRUCTIONS)
00-Client Funds

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   Delaware

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

 279,606     (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

279,606       (Item 5)

10




SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

279,606              (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS)
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.86%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO, IA

CUSIP No.  25385P106
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

GGCP, Inc.
	I.D. NO.  13-3056041
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
None

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

None  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

NONE  (ITEM 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

NONE  (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.00%

14


TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No.  25385P106
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

GAMCO Investors, Inc.
	I.D. NO.  13-4007862


CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
WC

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
  New York

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

30,000  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

30,000  (ITEM 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

30,000   (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.09%
14



TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    HC, CO

CUSIP No.  25385P106
1
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Mario J. Gabelli
2
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a)


(b)

3
SEC USE ONLY

4
Source of funds (SEE INSTRUCTIONS)
00 - Funds of private entities

5
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2 (d) OR 2 (e)


6
CITIZENSHIP OR PLACE OF ORGANIZATION
   USA

NUMBER OF

SHARES

BENEFICIALLY

OWNED

BY EACH

REPORTING

PERSON

WITH

7



SOLE VOTING POWER

14,000  (Item 5)


8



SHARED VOTING POWER

NONE


9



SOLE DISPOSITIVE POWER

14,000  (ITEM 5)

10



SHARED DISPOSITIVE POWER

NONE
11



AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

14,000  (ITEM 5)
12



CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
(SEE INSTRUCTIONS) X
13



PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

0.04%
14


TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
    IN

Item 1.		Security and Issuer
		The class of equity securities to which this statement on
Schedule 13D relates is the Common Stock, par value $0.001, of Digital
Insight Corporation (the "Issuer"), a Delaware corporation with principal
offices located at 26025 Mureau Road, Calabasas, CA 91302.

Item 2.		Identity and Background
This statement is being filed by Mario J. Gabelli ("Mario
Gabelli") and various entities which he
directly or indirectly controls or for which he acts as chief investment
officer.  These entities, except for Lynch Interactive Corporation
("Interactive"), engage in various aspects of the securities business,
primarily as investment adviser to various institutional and individual
clients, including registered investment companies and pension plans, and as
general partner of various private investment partnerships.  Certain of these
entities may also make investments for their own accounts.
		The foregoing persons in the aggregate often own beneficially
more than 5% of a class of a particular issuer.  Although several of the
foregoing persons are treated as institutional investors for purposes of
reporting their beneficial ownership on the short-form Schedule 13G, the
holdings of those who do not qualify as institutional investors may exceed
the 1% threshold presented for filing on Schedule 13G or implementation of
their investment philosophy may from time to time require action which could
be viewed as not completely passive.  In order to avoid any question as to
whether their beneficial ownership is being reported on the proper form and
in order to provide greater investment flexibility and administrative
uniformity, these persons have decided to file their beneficial ownership
reports on the more detailed Schedule 13D form rather than on the short-form
Schedule 13G and thereby to provide more expansive disclosure than may be
necessary.
		(a), (b) and (c) - This statement is being filed by one or more
of the following persons: GGCP, Inc.  formerly known as Gabelli Group Capital
Partners, Inc. ("GGCP"), GAMCO Investors, Inc. formerly known as Gabelli
Asset Management Inc. ("GBL"), Gabelli Funds, LLC ("Gabelli Funds"), GAMCO
Asset Management Inc. formerly known as GAMCO Investors, Inc. ("GAMCO"),
Gabelli Advisers, Inc. ("Gabelli Advisers"), Gabelli Securities, Inc.
("GSI"), Gabelli & Company, Inc. ("Gabelli & Company"), MJG Associates, Inc.
("MJG Associates"), Gabelli Foundation, Inc. ("Foundation"), Mario Gabelli,
and Interactive.  Those of the foregoing persons signing this Schedule 13D
are hereafter referred to as the "Reporting Persons".
		GGCP makes investments for its own account and is the parent
company of GBL.  GBL, a public company listed on the New York Stock Exchange,
is the parent company for a variety of companies engaged in the securities
business, including those named below.
		GAMCO, a wholly-owned subsidiary of GBL, is an investment adviser
registered under the Investment Advisers Act of 1940, as amended ("Advisers
Act").  GAMCO is an investment manager providing discretionary managed
account services for employee benefit plans, private investors, endowments,
foundations and others.
		GSI, a majority-owned subsidiary of GBL, is an investment adviser
registered under the Advisers Act and serves as a general partner or
investment manager to limited partnerships and offshore investment companies.
As a part of its business, GSI may purchase or sell securities for its own
account.  It is the immediate parent of Gabelli & Company. GSI is the
Investment Manager of Gabelli Associates Fund, Gabelli Associates Fund II,
Gabelli Associates Limited, ALCE Partners, L.P., and Gabelli Multimedia
Partners, L.P.  GSI and Marc Gabelli own 45% and 55%, respectively, of
Gabelli Securities International Limited ("GSIL"). GSIL provides investment
advisory services to offshore funds and accounts.   GSIL is an investment
advisor of Gabelli International Gold Fund Limited, Gabelli European
Partners, Ltd., and Gabelli Global Partners, Ltd.
		Gabelli & Company, a wholly-owned subsidiary of GSI, is a broker-
dealer registered under the Securities Exchange Act of 1934, as amended
("1934 Act"), which as a part of its business regularly purchases and sells
securities for its own account.
		Gabelli Funds, a wholly owned subsidiary of GBL, is a limited
liability company. Gabelli Funds is an investment adviser registered under
the Advisers Act which presently provides discretionary managed account
services for The Gabelli Equity Trust Inc., The Gabelli Asset Fund, The
Gabelli Growth Fund, The Gabelli Convertible and Income Securities Fund,
Inc., The Gabelli Value Fund Inc., The Gabelli Small Cap Growth Fund, The
Gabelli Equity Income Fund, The Gabelli ABC Fund, The Gabelli Global
Telecommunications Fund, Gabelli Gold Fund, Inc., The Gabelli Global
Multimedia Trust Inc., The Gabelli Global Convertible Securities Fund,
Gabelli Capital Asset Fund, Gabelli International Growth Fund, Inc., The
Gabelli Global Growth Fund, The Gabelli Utility Trust, The Gabelli Global
Opportunity Fund, The Gabelli Utilities Fund, The Gabelli Blue Chip Value
Fund, The Gabelli Mathers Fund, The Gabelli Woodland Small Cap Value Fund,
The Comstock Capital Value Fund, The Comstock Strategy Fund, The Gabelli
Dividend and Income Trust, The Gabelli Global Utility & Income Trust, The
Gabelli Global Gold, Natural Resources, & Income Trust (collectively, the
"Funds"), which are registered investment companies.
		Gabelli Advisers, a subsidiary of GBL, is an investment adviser
which provides discretionary advisory services to The Gabelli Westwood Mighty
Mitessm Fund.
		MJG Associates provides advisory services to private investment
partnerships and offshore funds.  Mario Gabelli is the sole shareholder,
director and employee of MJG Associates.   MJG Associates is the Investment
Manager of Gabelli International Limited, Gabelli International II Limited,
Gabelli Performance Partnership, and Gabelli Fund, LDC.
The Foundation is a private foundation.  Mario Gabelli is the
President, a Trustee and the
Investment Manager of the Foundation.
		 Interactive is a holding company with operating subsidiaries
engaged primarily in the rural telephone industry.  Interactive actively
pursues new business ventures and acquisitions.  Interactive makes
investments in marketable securities to preserve capital and maintain
liquidity for financing their business activities and acquisitions and are
not engaged in the business of investing, reinvesting, or trading in
securities.  Mario J. Gabelli is a director, and substantial shareholder of
Interactive.
		Mario Gabelli is the majority stockholder and Chief Executive
Officer of GGCP and Chairman and Chief Executive Officer of GBL.  GGCP is the
majority shareholder of GBL. GBL, in turn, is the sole stockholder of GAMCO.
GBL is also the majority stockholder of GSI and the largest shareholder of
Gabelli Advisers.  Gabelli & Company is a wholly-owned subsidiary of GSI.
		The Reporting Persons do not admit that they constitute a group.
		GGCP, GBL, GAMCO, and Gabelli & Company are New York corporations
and GSI and Gabelli Advisers are Delaware corporations, each having its
principal business office at One Corporate Center, Rye, New York 10580.
Gabelli Funds is a New York limited liability company having its principal
business office at One Corporate Center, Rye, New York 10580.  MJG Associates
is a Connecticut corporation having its principal business office at 140
Greenwich Avenue, Greenwich, CT 06830.  The Foundation is a Nevada corporation
having its principal offices at 165 West Liberty Street, Reno, Nevada 89501.
Interactive is a Delaware corporation having its principal place of business at
401 Theodore Fremd Avenue, Rye, New York 10580.
		For information required by instruction C to Schedule 13D with
respect to the executive officers and directors of the foregoing entities and
other related persons (collectively, "Covered Persons"), reference is made to
Schedule I annexed hereto and incorporated herein by reference.
(f) - Reference is made to Schedule I hereto.

Item 3.		Source and Amount of Funds or Other Consideration
		The Reporting Persons used an aggregate of approximately
$65,252,890 to purchase the Securities reported as beneficially owned in Item
5. GAMCO and Gabelli Funds used approximately $43,628,447 and $6,899,454,
respectively, of funds that were provided through the accounts of certain of
their investment advisory clients (and, in the case of some of such accounts at
GAMCO, may be through borrowings from client margin accounts) in order to
purchase the Securities for such clients.  MJG Associates used approximately
$611,446 of client funds to purchase the Securities reported by it.  GSI used
approximately $10,699,723 of client funds to purchase the Securities reported
by it.  The Foundation used approximately $958,625 of its funds to purchase the
Securities reported by it.  GBL used approximately $1,151,199 of working
capital to purchase the Securities reported by it.  Mario J. Gabelli used
approximately $536,971 of funds of private entities to purchase the Securities
reported by him.  Gabelli & Company used approximately $767,025 of working
capital to purchase the Securities reported by it.

Item 4.		Purpose of Transaction
		Each of the Reporting Persons has purchased and holds the
Securities reported by it for investment for one or more accounts over which
it has shared, sole, or both investment and/or voting power, for its own
account, or both.
		The Reporting Persons, with the exception of  Interactive, are
engaged in the business of securities analysis and investment and pursue an
investment philosophy of identifying undervalued situations.  In pursuing
this investment philosophy, the Reporting Persons analyze the operations,
capital structure and markets of companies in which they invest, including
the Issuer, on a continuous basis through analysis of documentation and
discussions with knowledgeable industry and market observers and with
representatives of such companies (often at the invitation of management).
The Reporting Persons do not believe they possess material inside information
concerning the Issuer.  As a result of these analytical activities one or
more of the Reporting Persons may issue analysts reports, participate in
interviews or hold discussions with third parties or with management in which
the Reporting Person may suggest or take a position with respect to potential
changes in the operations, management or capital structure of such companies
as a means of enhancing shareholder values.  Such suggestions or positions
may relate to one or more of the transactions specified in clauses (a)
through (j) of Item 4 of Schedule 13D including, without limitation, such
matters as disposing of one or more businesses, selling the company or
acquiring another company or business, changing operating or marketing
strategies, adopting or not adopting, certain types of anti-takeover measures
and restructuring the company's capitalization or dividend policy.
		Each of the Reporting Persons intends to adhere to the foregoing
investment philosophy with respect to the Issuer.  However, none of the
Reporting Persons intends to seek control of the Issuer or participate in the
management of the Issuer, and any Reporting Person that is registered as an
investment company under the 1940 Act will participate in such a transaction
only following receipt of an exemption from the SEC under Rule 17d-1 under
the 1940 Act, if required, and in accordance with other applicable law.  In
pursuing this investment philosophy, each Reporting Person will continuously
assess the Issuer's business, financial condition, results of operations and
prospects, general economic conditions, the securities markets in general and
those for the Issuer's securities in particular, other developments and other
investment opportunities, as well as the investment objectives and
diversification requirements of its shareholders or clients and its fiduciary
duties to such shareholders or clients.  Depending on such assessments, one
or more of the Reporting Persons may acquire additional Securities or may
determine to sell or otherwise dispose of all or some of its holdings of
Securities.  Although the Reporting Persons share the same basic investment
philosophy and although most portfolio decisions are made by or under the
supervision of Mario Gabelli, the investment objectives and diversification
requirements of various clients differ from those of other clients so that
one or more Reporting Persons may be acquiring Securities while others are
disposing of Securities.
		With respect to voting of the Securities, the Reporting Persons
have adopted general voting policies relating to voting on specified issues
affecting corporate governance and shareholder values.  Under these policies,
the Reporting Persons generally vote all securities over which they have
voting power in favor of cumulative voting, financially reasonable golden
parachutes, one share one vote, management cash incentives and pre-emptive
rights and against greenmail, poison pills, supermajority voting, blank check
preferred stock and super-dilutive stock options.  Exceptions may be made
when management otherwise demonstrates superior sensitivity to the needs of
shareholders.  In the event that the aggregate voting position of all joint
filers shall exceed 25% of the total voting position of the issuer then the
proxy voting committees of each of the Funds shall vote their Fund's shares
independently.
		Each of the Covered Persons who is not a Reporting Person has
purchased the Securities reported herein as beneficially owned by him for
investment for his own account or that of one or more members of his
immediate family.  Each such person may acquire additional Securities or
dispose of some or all of the Securities reported herein with respect to him.
		Other than as described above, none of the Reporting Persons and
none of the Covered Persons who is not a Reporting Person has any present
plans or proposals which relate to or would result in any transaction, change
or event specified in clauses (a) through (j) of Item 4 of Schedule 13D.

Item 5.		Interest In Securities Of The Issuer
(a) The aggregate number of Securities to which this Schedule 13D
relates is 1,702,910 shares, representing 5.25% of the 32,423,300 shares
outstanding as reported in the Issuer's most recent Form 10-Q for the quarter
ended September 30, 2006. The Reporting Persons beneficially own those
Securities as follows:

Name
Shares of
Common Stock
% of Class of
Common

Gabelli Funds


180,000

0.56%
GAMCO
1,138,304
3.51%

MJG Associates

16,000

0.05%

GSI

279,606

0.86%

Foundation

Mario Gabelli

GBL

Gabelli & Company

25,000

14,000

30,000

20,000


0.08%

0.04%

0.09%

0.06%

		Mario Gabelli is deemed to have beneficial ownership of the
Securities owned beneficially by each of the foregoing persons.  GSI is deemed
to have beneficial ownership of the Securities owned beneficially by Gabelli &
Company.  GBL and GGCP are deemed to have beneficial ownership of the
Securities owned beneficially by each of the foregoing persons other than Mario
Gabelli and the Foundation.
(b) Each of the Reporting Persons and Covered Persons has the sole
power to vote or direct the vote and sole power to dispose or to direct the
disposition of the Securities reported for it, either for its own benefit or
for the benefit of its investment clients or its partners, as the case may be,
except that (i) Gabelli Funds has sole dispositive and voting power with
respect to the shares of the Issuer held by the Funds so long as the aggregate
voting interest of all joint filers does not exceed 25% of their total voting
interest in the Issuer and, in that event, the Proxy Voting Committee of each
Fund shall respectively vote that Fund's shares, (ii) at any time, the Proxy
Voting Committee of each such Fund may take and exercise in its sole discretion
the entire voting power with respect to the shares held by such fund under
special  circumstances such as regulatory considerations, and (iii) the power
of Mario Gabelli, GBL, and GGCP is indirect with respect to Securities
beneficially owned directly by other Reporting Persons.
		(c) Information with respect to all transactions in the
Securities which were effected during the past sixty days or since the most
recent filing on Schedule 13D, whichever is less, by each of the Reporting
Persons and Covered Persons is set forth on Schedule II annexed hereto and
incorporated herein by reference.
		(d) The investment advisory clients of, or partnerships managed
by, GAMCO, Gabelli Funds, Gabelli Advisers and MJG Associates have the sole
right to receive and, subject to the notice, withdrawal and/or termination
provisions of such advisory contracts and partnership arrangements, the sole
power to direct the receipt of dividends from, and the proceeds of sale of,
any of the Securities beneficially owned by such Reporting Persons on behalf
of such clients or partnerships.  Except as noted, no such client or
partnership has an interest by virtue of such relationship that relates to
more than 5% of the Securities.
(e) Not applicable.
Item 6.		Contracts, Arrangements, Understandings or Relationships
with Respect
		to Securities of the Issuer
		The powers of disposition and voting of Gabelli Funds, Gabelli
Advisers, GAMCO, GSI and MJG Associates with respect to Securities owned
beneficially by them on behalf of their investment advisory clients, and of
MJG Associates and GSI with respect to Securities owned beneficially by them
on behalf of the partnerships which they directly or indirectly manage, are
held pursuant to written agreements with such clients, partnerships and
funds.

Item 7. 		Material to be Filed as an Exhibit
		The following Exhibit A is attached hereto.  The following
Exhibit B is incorporated by reference to Exhibit C in the Amendment No. 8 to
Schedule 13D of the Reporting Persons with respect to Edgewater Technologies,
Inc.
Exhibit A:
Joint Filing Agreement


Exhibit B:
Powers of Attorney to Douglas R. Jamieson and James E. McKee
from Robert E. Dolan

Powers of Attorney to Douglas R. Jamieson and James E. McKee
from Mario J. Gabelli.





Signature
	After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.
Dated:	December 28, 2006

MARIO J. GABELLI
MJG ASSOCIATES, INC.
GGCP, INC.
GABELLI FOUNDATION, INC.



By:/s/ James E. McKee
		James E. McKee
		Attorney-in-Fact



GAMCO INVESTORS, INC.
GABELLI FUNDS, LLC
GABELLI SECURITIES, INC.
GABELLI & COMPANY, INC.




By:/s/ James E. McKee
		James E. McKee
		Secretary



GAMCO ASSET MANAGEMENT INC.



By:/s/ Douglas R. Jamieson
		Douglas R. Jamieson
		President and Chief Operating Officer


      SCHEDULE I
     Information with Respect to Executive
Officers and Directors of the Undersigned
Schedule I to Schedule 13D is amended, in pertinent part, as follows:

The following sets forth as to each of the executive officers and
directors of the undersigned: his name; his business address; his
present principal occupation or employment and the name,
principal business and address of any corporation or other
organization in which such employment is conducted.  Unless
otherwise specified, the principal employer of each such
individual is GAMCO Asset Management, Inc., Gabelli Funds, LLC,
Gabelli & Company, Inc., or GAMCO Investors, Inc., the business
address of each of which is One Corporate Center, Rye, New York
10580, and each such individual identified below is a citizen of
the United States.  To the knowledge of the undersigned, during
the last five years, no such person has been convicted in a
criminal proceeding (excluding traffic violations or similar
misdemeanors), and no such person was a party to a civil
proceeding of a judicial or administrative body of competent
jurisdiction as a result of which he was or is subject to a
judgment, decree or final order enjoining future violations of,
or prohibiting or mandating activities subject to, federal or
state securities law or finding any violation with respect to
such laws except as reported in Item 2(d) of this Schedule 13D.






GGCP, Inc.
Directors:

	Vincent J. Amabile

Business Consultant

	Mario J. Gabelli

Chief Executive Officer of GGCP, Inc., and GAMCO
Investors, Inc.; Director/Trustee of all
registered investment companies advised by
Gabelli Funds, LLC; Chief Executive Officer of
Lynch Interactive Corporation.

	Marc J. Gabelli

Chairman of Lynch Corporation

	Matthew R. Gabelli

Vice President - Trading
Gabelli & Company, Inc.
One Corporate Center
Rye, New York 10580

	Charles C. Baum

Secretary & Treasurer
United Holdings Co., Inc.
2545 Wilkens Avenue
Baltimore, MD   21223

	Douglas R. Jamieson

See below

Joseph R. Rindler,
Jr.

Business Consultant/former Chairman of GAMCO
Asset Management Inc.
               Fredric V.
Salerno
Chairman; Former Vice Chairman and Chief Financial
Officer
Verizon Communications

Officers:

	Mario J. Gabelli
 Chief Executive Officer and Chief Investment
Officer

	Henry Kiernan
Vice President, Chief Financial Officer and
Secretary





GAMCO Investors, Inc.
Directors:


               Edwin L.
Artzt




               Richard L.
Bready

Former Chairman and Chief Executive Officer
Procter & Gamble Company
900 Adams Crossing
Cincinnati, OH 45202

Chairman and Chief Executive Officer
Nortek, Inc.
50 Kennedy Plaza
Providence, RI 02903

	Mario J. Gabelli


               John D.
Gabelli
See above


Senior Vice President


               John C.
Ferrara


See below



	Karl Otto Pohl (1)




              Robert S.
Prather






               Vincent S.
Tese





Sal. Oppenheim jr. & Cie.
Bockenheimer Landstrasse 20
D-6000 FRANKFURT AM MAIN
Germany

President & Chief Operating Officer
Gray Television, Inc.
4370 Peachtree Road, NE
Atlanta, GA 30319


Lawyer, Investment Adviser and Cable Television
Executive
c/o Bear Stearns & Company, Inc.
245 Park Avenue, 19th Floor
New York, NY 10167


Officers:

	Mario J. Gabelli

Chairman and Chief Executive Officer

Douglas R. Jamieson

Henry G. Van der Eb

John C. Ferrara

President and Chief Operating Officer

Senior Vice President

Interim Chief Financial Officer
	James E. McKee

Vice President, General Counsel and Secretary

GAMCO Asset Management
Inc.
Directors:


	Douglas R. Jamieson
	Regina M. Pitaro
	F. William Scholz,
II
	William S. Selby


Officers:


	Mario J. Gabelli
Chief Investment Officer - Value Portfolios



	Douglas R. Jamieson


President and Chief Operating Officer


Gabelli Funds, LLC
Officers:


	Mario J. Gabelli

Chief Investment Officer - Value Portfolios
	Bruce N. Alpert
Executive Vice President and Chief Operating
Officer

	James E. McKee
Secretary



Gabelli Advisers, Inc.
Directors:


	Bruce N. Alpert
               Douglas R.
Jamieson

See above
See above
Officers:


	Bruce N. Alpert
Chief Operating Officer

	James E. McKee
Secretary

Gabelli Securities, Inc.


Directors:


	Robert W. Blake
President of W. R. Blake & Sons, Inc.
196-20 Northern Boulevard
Flushing, NY   11358

	Douglas G. DeVivo
General Partner of ALCE Partners, L.P.
One First Street, Suite 16
Los Altos, CA   94022


               Douglas R.
Jamieson

               F. William
Scholz, II


President and Chief Operating Officer

See above


Officers:


	Douglas R. Jamieson

               James E. McKee

               Kieran Caterina
See above

Assistant Secretary

Chief Financial Officer


Gabelli & Company, Inc.
Directors:


	James G. Webster, III
Chairman & Interim President

	Irene Smolicz
Senior Trader
Gabelli & Company, Inc.



Officers:


	James G. Webster, III
Chairman & Interim President

	Bruce N. Alpert
Vice President - Mutual Funds



               James E. McKee
Secretary




Lynch Interactive Corporation,
401 Theodore Fremd Avenue Rye, NY 10580


Directors:


	Mario J. Gabelli

See above - GGCP, Inc.


Glenn Angelillo
P.O. Box 128
New Canaan, CT 06840


              Alfred W. Fiore
The Ross Companies
1270 Avenue of the Americas
New York, NY 10020-1703


	Salvatore Muoio
Principal
S. Muoio & Co., LLC
Suite 406
509 Madison Ave.
New York, NY 10022


              Lawrence R. Moats


Moats Office & Properties, Inc.
100 West Palatine Road, Ste. L30
P.O. Box 1189
Palatine, IL 60078-1189


Gary L. Sugarman

Chief Executive Officer
Richfield Associates
400 Andrews Street
Rochester, NY 14604
Officers:


	Mario J. Gabelli

Chairman
	Robert E. Dolan

Interim President and Chief Executive Officer,
Chief Financial Officer






(1) Citizen of Germany





                                   SCHEDULE II
                            INFORMATION WITH RESPECT TO
                 TRANSACTIONS EFFECTED DURING THE PAST SIXTY DAYS OR
                 SINCE THE MOST RECENT FILING ON SCHEDULE 13D (1)

                                    SHARES PURCHASED        AVERAGE
                        DATE            SOLD(-)             PRICE(2)

COMMON STOCK-DIGITAL INSIGHT CORP.

          GABELLI FOUNDATION
                      12/14/06            5,000            38.3630
                      12/13/06           10,000            38.4345
                      12/01/06           10,000            38.2465
          MARIO J. GABELLI
                      12/11/06            8,000            38.3619
                      12/05/06            2,000            38.4700
                      12/01/06            2,000            38.2600
                      11/30/06            2,000            38.3075
          GABELLI SECURITIES, INC.
                      12/01/06            2,000            38.2564
                      11/30/06            2,000            38.2050
             GABELLI MULTIMEDIA PARTNERS
                      12/04/06           10,000            38.3329
             GABELLI ASSOCIATES LTD
                      12/19/06            1,000            38.3525
                      12/15/06           13,000            38.3123
                      12/14/06            4,500            38.3467
                      12/13/06            6,500            38.3562
                      12/11/06            7,098            38.3512
                      12/08/06            1,647            38.3396
                      12/07/06            8,500            38.3508
                      12/06/06           12,000            38.3686
                      12/04/06            2,500            38.3180
                      12/01/06           15,000            38.2496
                      11/30/06           50,000            38.1963
             GABELLI ASSOCIATES FUND II
                      12/15/06            1,500            38.3117
                      12/14/06              500            38.3450
                      12/13/06              500            38.3550
                      12/11/06            1,000            38.3530
                      12/07/06            1,000            38.3499
                      12/06/06            1,500            38.3680
                      12/01/06            1,500            38.2510
                      11/30/06            4,900            38.1967
             GABELLI ASSOCIATES FUND
                      12/19/06            1,283            38.3508
                      12/15/06           14,000            38.3122
                      12/14/06            4,500            38.3467
                      12/13/06            7,000            38.3561
                      12/11/06            8,000            38.3511
                      12/08/06            2,000            38.3388
                      12/07/06            9,678            38.3507
                      12/06/06           12,000            38.3686
                      12/04/06            2,500            38.3180
                      12/01/06           16,500            38.2496
                      11/30/06           54,000            38.1963
          MJG ASSOCIATES, INC.
             GABELLI PERFORMANCE PARTNERSHIP
                      12/14/06            6,000            38.3550
                      12/01/06            2,000            38.2564
                      11/30/06            2,000            38.2050
             GABELLI INTERNATIONAL II LTD
                      12/01/06            1,000            38.2564
                      11/30/06            1,000            38.2050
             GABELLI INTERNATIONAL LTD
                      12/01/06            2,000            38.2564
                      11/30/06            2,000            38.2050
          GAMCO INVESTORS, INC.
                      12/07/06           30,000            38.3733
          GAMCO ASSET MANAGEMENT INC.
                      12/26/06              500            38.4500
                      12/26/06            2,000            38.4800
                      12/26/06              500            38.4300
                      12/19/06            1,404            38.3863
                      12/18/06            6,500            38.3550
                      12/18/06           34,300            38.3550
                      12/15/06           14,000            38.3374
                      12/15/06            2,000            38.4150
                      12/15/06            3,000            38.3374
                      12/15/06            1,000            38.4500
                      12/15/06            1,500            38.3117
                      12/15/06            2,000            38.3825
                      12/14/06              500            38.3450
                      12/14/06            5,000            38.3630
                      12/13/06            8,000            38.4250
                      12/13/06           24,773            38.3972
                      12/13/06            5,700            38.4060
                      12/13/06           20,000            38.3979
                      12/13/06            2,000            38.4271
                      12/13/06            3,000            38.4163
                      12/13/06            1,000            38.3550
                      12/12/06           17,300            38.3929
                      12/12/06           20,000            38.3924
                      12/12/06            9,000            38.3963
                      12/12/06            1,500            38.4324
                      12/12/06           35,000            38.3910
                      12/12/06            5,000            38.4021
                      12/12/06           75,227            38.3900
                      12/12/06            2,000            38.4216
                      12/12/06            3,000            38.4108
                      12/12/06            2,000            38.4050
                      12/11/06            1,000            38.3530
                      12/11/06            6,000            38.3697
                      12/11/06            6,000            38.3805
                      12/11/06            5,000            38.3610
                      12/11/06            6,159            38.3586
                      12/11/06            7,000            38.4130
                      12/08/06            5,000            38.3872
                      12/08/06              500            38.3550
                      12/08/06            1,700            38.3550
                      12/07/06              659            38.4457
                      12/07/06           50,000            38.3550
                      12/07/06           28,315            38.3494
                      12/07/06            6,700            38.3568
                      12/07/06            4,400            38.3766
                      12/07/06            3,000            38.3688
                      12/07/06            3,100            38.3681
                      12/07/06            4,000            38.3796
                      12/07/06            6,000            38.4121
                      12/07/06           10,000            38.3550
                      12/07/06           10,000            38.3601
                      12/07/06            1,000            38.3499
                      12/07/06           26,326            38.3496
                      12/06/06           34,700            38.3482
                      12/06/06            6,000            38.3788
                      12/06/06           21,457            38.3493
                      12/06/06            7,000            38.4000
                      12/06/06            3,000            38.3896
                      12/06/06           20,000            38.4039
                      12/06/06            8,300            38.3541
                      12/06/06            3,000            38.4113
                      12/06/06            3,900            38.3630
                      12/06/06            4,500            38.3680
                      12/06/06            5,600            38.3695
                      12/06/06              600-           38.4038
                      12/04/06            1,058            38.4066
                      12/04/06            1,341            38.3937
                      12/04/06            2,000            38.3777
                      12/01/06           60,000            38.2450
                      12/01/06           10,000            38.2973
                      12/01/06           10,000            38.3050
                      12/01/06            2,000            38.3298
                      12/01/06           15,000            38.2778
                      12/01/06            5,000            38.2760
                      12/01/06            3,400            38.2500
                      12/01/06            2,500            38.2650
                      12/01/06            1,500            38.2510
                      12/01/06              500            38.2493
                      11/30/06           40,000            38.2000
                      11/30/06           14,000            38.2797
                      11/30/06           45,000            38.2834
                      11/30/06            4,000            38.2867
                      11/30/06           39,000            38.2921
                      11/30/06           15,000            38.2747
                      11/30/06           20,000            38.2737
                      11/30/06           50,000            38.2730
                      11/30/06           30,000            38.2726
                      11/30/06           36,985            38.2722
                      11/30/06           40,000            38.3029
                      11/30/06            1,000            38.4695
                      11/30/06            1,500            38.3137
                      11/30/06           12,000            38.3354
                      11/30/06           40,000            38.2769
                      11/30/06           12,000            38.2000
                      11/30/06            4,400            38.1968
                      11/30/06            1,700            38.1962
          GABELLI & COMPANY, INC.
                      12/11/06           16,000            38.3550
                      12/01/06            2,000            38.2925
                      11/30/06            2,000            38.3800
          GABELLI FUNDS, LLC.
               GABELLI VALUE FUND
                      12/06/06           12,100            38.4333
                      12/05/06           37,900            38.4525
               GABELLI CONVERTIBLE FUND
                      12/07/06           20,000            38.3550
               GABELLI ABC FUND
                      12/06/06            9,800            38.4333
                      12/05/06           30,200            38.4525
                      11/30/06           60,000            38.2183
               GLOBAL UTILITY & INCOME TRUST ARB
                      12/07/06           10,000            38.3550


(1) UNLESS OTHERWISE INDICATED, ALL TRANSACTIONS WERE EFFECTED
    ON THE NASDAQ GLOBAL SELECT MARKET.

(2) PRICE EXCLUDES COMMISSION.




Exhibit A

JOINT FILING AGREEMENT

		In accordance with Rule 13d-1(f) under the securities Exchange
Act of 1934, as amended, the undersigned hereby agree to the joint filing
with all other Reporting Entities (as such term is defined in the Schedule
13D referred to below) on behalf of each of them of a statement on Schedule
13D (including amendments thereto) with respect to the Common Stock, par
value $0.001, of Digital Insight Corporation, and that this Agreement be
included as an Exhibit to such joint filing.  This Agreement may be executed
in any number of counterparts all of which taken together shall constitute
one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this agreement this
December 28, 2006.


MARIO J. GABELLI
MARC J. GABELLI
GGCP, INC.
GABELLI PERFORMANCE PARTNERSHIP L.P.
GABELLI INTERNATIONAL LIMITED
GABELLI INTERNATIONAL II LIMITED
GABELLI FUND, LDC
MJG ASSOCIATES, INC.
GABELLI FOUNDATION, INC.



By:/s/ James E. McKee
		James E. McKee
     		Attorney-in-Fact




GAMCO INVESTORS, INC.
GABELLI FUNDS, LLC
GABELLI SECURITIES, INC.
GLI, INC.
GABELLI & COMPANY, INC.


By: /s/ James E. McKee
       	James E. McKee
       	Secretary or Assistant Secretary









ALCE PARTNERS, L.P.
GABELLI MULTIMEDIA PARTNERS, L.P.
GABELLI EUROPEAN PARTNERS MASTER FUND, LTD.
GABELLI GLOBAL PARTNERS MASTER FUND, LTD.
GABELLI ASSOCIATES LIMITED
GABELLI ASSOCIATES FUND



By:/s/ James E. McKee
      	James E. McKee
      	Secretary of Gabelli Securities Inc.







BRIGHTON COMMUNICATIONS CORPORATION
LYNCH INTERACTIVE CORPORATION
WESTERN NEW MEXICO
INTER-COMMUNITY TELEPHONE COMPANY



BY:/s/ James E. McKee
       	James E. McKee
       	Attorney-in-Fact





GAMCO ASSET MANAGEMENT INC.


By:/s/ Douglas R. Jamieson
    	 	Douglas R. Jamieson
     		President