UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 1)1

Integrated Silicon Solution, Inc.

(Name of Issuer)

Common Stock, par value $0.0001per share

(Title of Class of Securities)

45812P107

(CUSIP Number)

JEFFREY C. SMITH

STARBOARD VALUE LP

777 Third Avenue, 18th Floor

New York, New York 10017

(212) 845-7977

STEVE WOLOSKY, ESQ.

OLSHAN FROME WOLOSKY LLP

Park Avenue Tower

65 East 55th Street

New York, New York 10022

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

December 1, 2014

(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 §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨.

Note:  Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See § 240.13d-7 for other parties to whom copies are to be sent.

_______________

1              The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 2,399,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,399,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON PN

2

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,429,570
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,429,570
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,429,570
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 4.7%
14	TYPE OF REPORTING PERSON CO

3

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY S LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 323,361
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 323,361
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 323,361
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1%
14	TYPE OF REPORTING PERSON OO

4

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY C LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 176,386
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 176,386
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 176,386
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

5

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE R LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 176,386
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 176,386
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 176,386
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

6

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE R GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 176,386
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 176,386
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 176,386
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON OO

7

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 2,399,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,399,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON OO

8

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD PRINCIPAL CO LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 2,399,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,399,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON PN

9

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD PRINCIPAL CO GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 2,399,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 2,399,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON OO

10

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON JEFFREY C. SMITH
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER 2,399,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 2,399,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON IN

11

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON MARK R. MITCHELL
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER 2,399,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 2,399,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON IN

12

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON PETER A. FELD
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER 2,399,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 2,399,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,399,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 7.8%
14	TYPE OF REPORTING PERSON IN

13

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON OLIVER PRESS INVESTORS, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC, OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 59,600
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 59,600
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 59,600
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON OO

14

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON AUGUSTUS K. OLIVER II
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER 59,600
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 59,600
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 59,600
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

15

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON CLIFFORD PRESS
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER 59,600
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 59,600
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 59,600
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

16

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON MANOJ GUJRAL
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 - 0 -
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON - 0 -
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0%
14	TYPE OF REPORTING PERSON IN

17

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON CATHAL PHELAN
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA, IRELAND
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,000
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,000
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

18

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON EDWARD TERINO
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x   (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 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 1,000
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,000
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

19

CUSIP NO. 45812P107

The following constitutes Amendment No. 1 to the Schedule 13D filed by the undersigned (“Amendment No. 1”).  This Amendment No. 1 amends the Schedule 13D as specifically set forth herein.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by each of Starboard V&O Fund, Starboard S LLC and Starboard C LP and held in the Starboard Value LP Account were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein.  The aggregate purchase price of the 1,429,570 Shares beneficially owned by Starboard V&O Fund is approximately $19,833,307, excluding brokerage commissions.  The aggregate purchase price of the 323,361 Shares beneficially owned by Starboard S LLC is approximately $4,489,870, excluding brokerage commissions. The aggregate purchase price of the 176,386 Shares beneficially owned by Starboard C LP is approximately $2,449,392, excluding brokerage commissions. The aggregate purchase price of the 469,833 Shares held in the Starboard Value LP Account is approximately $6,523,229, excluding brokerage commissions.

The Shares purchased by Oliver Press Investors were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein. The aggregate purchase price of the 59,600 Shares beneficially owned by Oliver Press Investors is approximately $746,448, excluding brokerage commissions.

The Shares purchased by Mr. Phelan were purchased in the open market with personal funds.  The aggregate purchase price of the 1,000 Shares owned directly by Mr. Phelan is approximately $14,488, excluding brokerage commissions.

The Shares purchased by Mr. Terino were purchased in the open market with personal funds.  The aggregate purchase price of the 1,000 Shares owned directly by Mr. Terino is approximately $14,639, excluding brokerage commissions.

Item 4. Purpose of Transaction.

Item 4 is hereby amended to add the following:

On December 1, 2014, Starboard Value LP (“Starboard”) and Oliver Press Partners, LLC (“OPP”) delivered a letter to Scott Howarth, President and Chief Executive Officer of the Issuer, with a copy to the Issuer’s Board of Directors (the “Board”), pursuant to which Starboard and OPP expressed their belief that the Issuer is meaningfully undervalued and that substantial opportunities exist within the control of management and the Board to create value for all shareholders.  Starboard and OPP also expressed their belief that the Board needs to be reconstituted with directors that have the experience, the independence, and the shareholder-oriented mindset to oversee and implement the changes necessary to drive substantial value. Starboard and OPP concluded the letter by stating that they look forward to working constructively with the Issuer in order to reconstitute the Board with the most qualified directors for the benefit of all shareholders.

As previously disclosed in the Schedule 13D, Starboard has nominated a slate of five highly qualified director candidates, including Peter A. Feld, Manoj Gujral, Cathal Phelan, Clifford Press and Edward Terino, for election to the Board at the Issuer’s 2015 annual meeting of stockholders.

20

CUSIP NO. 45812P107

Item 5. Interest in Securities of the Issuer.

Items 5(a)-(c) are hereby amended and restated to read as follows:

The aggregate percentage of Shares reported owned by each person named herein is based upon 30,710,313 Shares outstanding, as of August 1, 2014, which is the total number of Shares outstanding as reported in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 7, 2014.

A. Starboard V&O Fund

(a) As of the close of business on December 2, 2014, Starboard V&O Fund beneficially owned 1,429,570 Shares.

Percentage: Approximately 4.7%

(b) 1. Sole power to vote or direct vote: 1,429,570

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,429,570

4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard V&O Fund since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

B. Starboard S LLC

(a) As of the close of business on December 2, 2014, Starboard S LLC beneficially owned 323,361 Shares.

Percentage: Approximately 1.1%

(b) 1. Sole power to vote or direct vote: 323,361

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 323,361

4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard S LLC since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

C. Starboard C LP

(a) As of the close of business on December 2, 2014, Starboard C LP beneficially owned 176,386 Shares.

Percentage: Less than 1%

21

CUSIP NO. 45812P107

(b) 1. Sole power to vote or direct vote: 176,386

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 176,386

4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard C LP since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

D. Starboard R LP

(a) Starboard R LP, as the general partner of Starboard C LP, may be deemed the beneficial owner of the 176,386 shares owned by Starboard C LP.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 176,386

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 176,386

4. Shared power to dispose or direct the disposition: 0

(c) Starboard R LP has not entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of Starboard C LP since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

E. Starboard R GP

(a) Starboard R GP, as the general partner of Starboard R LP, may be deemed the beneficial owner of the 176,386 shares owned by Starboard C LP.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 176,386

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 176,386

4. Shared power to dispose or direct the disposition: 0

(c) Starboard R GP has not entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of Starboard C LP since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

F. Starboard Value LP

(a) As of the close of business on December 2, 2014, 469,833 Shares were held in the Starboard Value LP Account.  Starboard Value LP, as the investment manager of Starboard V&O Fund, Starboard C LP and the Starboard Value LP Account and the manager of Starboard S LLC, may be deemed the beneficial owner of the (i) 1,429,570 Shares owned by Starboard V&O Fund, (ii) 323,361 Shares owned by Starboard S LLC, (iii) 176,386 Shares owned by Starboard C LP, and (iv) 469,833 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.8%

22

CUSIP NO. 45812P107

(b) 1. Sole power to vote or direct vote: 2,399,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 2,399,150

4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Starboard Value LP through the Starboard Value LP Account and on behalf of each of Starboard V&O Fund, Starboard S LLC and Starboard C LP since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

G. Starboard Value GP

(a) Starboard Value GP, as the general partner of Starboard Value LP, may be deemed the beneficial owner of the (i) 1,429,570 Shares owned by Starboard V&O Fund, (ii) 323,361 Shares owned by Starboard S LLC, (iii) 176,386 Shares owned by Starboard C LP, and (iv) 469,833 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.8%

(b) 1. Sole power to vote or direct vote: 2,399,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 2,399,150

4. Shared power to dispose or direct the disposition: 0

(c) Starboard Value GP has not entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

H. Principal Co

(a) Principal Co, as a member of Starboard Value GP, may be deemed the beneficial owner of the (i) 1,429,570 Shares owned by Starboard V&O Fund, (ii) 323,361 Shares owned by Starboard S LLC, (iii) 176,386 Shares owned by Starboard C LP, and (iv) 469,833 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.8%

(b) 1. Sole power to vote or direct vote: 2,399,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 2,399,150

4. Shared power to dispose or direct the disposition: 0

(c) Principal Co has not entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

23

CUSIP NO. 45812P107

I. Principal GP

(a) Principal GP, as the general partner of Principal Co, may be deemed the beneficial owner of the (i) 1,429,570 Shares owned by Starboard V&O Fund, (ii) 323,361 Shares owned by Starboard S LLC, (iii) 176,386 Shares owned by Starboard C LP, and (iv) 469,833 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.8%

(b) 1. Sole power to vote or direct vote: 2,399,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 2,399,150

4. Shared power to dispose or direct the disposition: 0

(c) Principal GP has not entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

J. Messrs. Smith, Mitchell and Feld

(a) Each of Messrs. Smith, Mitchell and Feld, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed the beneficial owner of the (i) 1,429,570 Shares owned by Starboard V&O Fund, (ii) 323,361 Shares owned by Starboard S LLC, (iii) 176,386 Shares owned by Starboard C LP, and (iv) 469,833 Shares held in the Starboard Value LP Account.

Percentage: Approximately 7.8%

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 2,399,150

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 2,399,150

(c) None of Messrs. Smith, Mitchell or Feld has entered into any transactions in the Shares since the filing of the Schedule 13D.  The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

K.           Oliver Press Investors

(a) As of the close of business on December 2, 2014, Oliver Press Investors beneficially owned 59,600 Shares.

Percentage: Less than 1%

24

CUSIP NO. 45812P107

(b) 1. Sole power to vote or direct vote: 59,600

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 59,600

4. Shared power to dispose or direct the disposition: 0

(c) Oliver Press Investors has not entered into any transactions in the Shares since the filing of the Schedule 13D.

L.           Messrs. Oliver and Press

(a) Each of Messrs. Oliver and Press, as a managing member of Oliver Press Investors, may be deemed the beneficial owner of the 59,600 Shares owned by Oliver Press Investors.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 59,600

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 59,600

(c) None of Messrs. Oliver or Press has entered into any transactions in the Shares since the filing of the Schedule 13D.

M.           Mr. Gujral

(a) As of the close of business on December 2, 2014, Mr. Gujral did not own any Shares.

Percentage: 0%

(b) 1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 0

(c) Mr. Gujral has not entered into any transactions in the Shares since the filing of the Schedule 13D.

N.           Mr. Phelan

(a) As of the close of business on December 2, 2014, Mr. Phelan directly owned 1,000 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 1,000

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,000

4. Shared power to dispose or direct the disposition: 0

(c) The transactions in the Shares by Mr. Phelan since the filing of the Schedule 13D are set forth in Schedule A and are incorporated herein by reference.

25

CUSIP NO. 45812P107

O.           Mr. Terino

(a) As of the close of business on December 2, 2014, Mr. Terino directly owned 1,000 Shares.

Percentage: Less than 1%

(b) 1. Sole power to vote or direct vote: 1,000

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,000

4. Shared power to dispose or direct the disposition: 0

(c) Mr. Terino has not entered into any transactions in the Shares since the filing of the Schedule 13D.

As of the close of business on December 2, 2014, the Reporting Persons collectively beneficially owned an aggregate of 2,460,750 Shares, constituting approximately 8.0% of the Shares outstanding.

Each Reporting Person, as a member of a “group” with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, may be deemed the beneficial owner of the Shares directly owned by the other Reporting Persons.  Each Reporting Person disclaims beneficial ownership of such Shares except to the extent of his or its pecuniary interest therein.

Item 7. Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibit:

99.1 Letter to Scott Howarth, the President and Chief Executive Officer of the Issuer (a copy to the Board of Directors), dated December 1, 2014.

26

CUSIP NO. 45812P107

SIGNATURES

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated:  December 3, 2014

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD By: Starboard Value LP,        its investment manager   STARBOARD VALUE AND OPPORTUNITY S LLC By: Starboard Value LP,        its manager   STARBOARD VALUE AND OPPORTUNITY C LP By: Starboard Value R LP        its general partner   STARBOARD VALUE R LP By: Starboard Value R GP LLC,        its general partner   STARBOARD VALUE LP By: Starboard Value GP LLC,        its general partner STARBOARD VALUE GP LLC By: Starboard Principal Co LP,        its member   STARBOARD PRINCIPAL CO LP By: Starboard Principal Co GP LLC,        its general partner   STARBOARD PRINCIPAL CO GP LLC   STARBOARD VALUE R GP LLC

By:	/s/ Jeffrey C. Smith
	Name:	Jeffrey C. Smith
	Title:	Authorized Signatory

/s/ Jeffrey C. Smith

JEFFREY C. SMITH

Individually and as attorney-in-fact for Mark R. Mitchell, Peter A. Feld, Manoj Gujral, Cathal Phelan, and Edward Terino

27

CUSIP NO. 45812P107

Oliver Press Investors, LLC
By:	/s/ Clifford Press
	Name:	Clifford Press
	Title:	Managing Member

/s/ Augustus K. Oliver II

AUGUSTUS K. OLIVER II

/s/ Clifford Press

CLIFFORD PRESS

28

CUSIP NO. 45812P107

SCHEDULE A

Transactions in the Shares Since the Filing of the Schedule 13D

Shares of Common Stock Purchased/(Sold) Price Per Share($) Date of Purchase / Sale

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

118,893 14.5272 11/28/2014

STARBOARD VALUE AND OPPORTUNITY S LLC

26,686 14.5272 11/28/2014

STARBOARD VALUE AND OPPORTUNITY C LP

14,538 14.5272 11/28/2014

STARBOARD VALUE LP

(Through the Starboard Value LP Account)

39,033 14.5272 11/28/2014

CATHAL PHELAN

1,000 14.4880 11/28/2014