Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	$ 1,153	$ 3,328	$ 2,408	$ 4,736
Unrecognized Compensation Cost	7,475		7,475
Expiration date of the 2007 stock incentive plan			May 22, 2017
Maximum number of shares granted under restricted stock, unrestricted stock, RSU's and stock options to officers, employees and employee directors (in shares)	3,000,000		3,000,000
Outstanding:
Balance			384,000
Balance (in dollars per share)			$ 15.40
Granted (in shares)			0
Granted (in dollars per share)			$ 0.00
Exercised (in shares)			(22,095)
Exercised (in dollars per share)			$ 7.89
Cancelled or forfeited (in shares)			(232,000)
Cancelled or forfeited (in dollars per share)			$ 16.29
Balance	130,000		130,000
Balance (in dollars per share)	$ 15.08		$ 15.08
Weighted average remaining contractual life of options outstanding at June 30, 2012			4 years
Vested and expected to vest [Abstract]
Vested and expected to vest (in shares)	130,000		130,000
Vested and expected to vest (in dollars per share)	$ 15.08		$ 15.08
Remaining contractual term of options, vested and expected to vest at June 30, 2012			4 years
Exercisable (in shares)	99,000		99,000
Exercisable (in dollars per share)	$ 14.88		$ 14.88
Remaining contractual term of options, exercisable at June 30, 2012			3 years 8 months 8 days
Share-based compensation arrangement by share-based payment award, options, vested during period (in shares)			30,000
Share-based compensation arrangement by share-based payment award, options, non-vested, outstanding (in shares)	31,000		31,000
Share-based compensation arrangement by share-based payment award, options, non-vested, weighted average grant date fair value (in dollars per share)	$ 10.07		$ 10.07
Stock price per share (in dollars per share)	$ 9.43		$ 9.43
Share-based compensation arrangement by share-based payment award, options, exercisable, intrinsic value	0		0
Stock options exercised (in shares)			22,095
Intrinsic value under share based compensation scheme			110
Outstanding:
Balance (in shares)			891,000
Balance (in dollars per share)			$ 12.58
Granted (in shares)			437,000
Granted (in dollars per share)			$ 12.31
Vested (in shares)			(12,000)
Vested (in dollars per share)			$ 8.29
Cancelled or forfeited (in shares)			0
Cancelled or forfeited (in dollars per share)			$ 0.00
Balance (in shares)	1,316,000		1,316,000
Balance (in dollars per share)	$ 12.53		$ 12.53
Expected to vest at June 30, 2012 (in shares)	1,316,000		1,316,000
Number of RSUs with performance-based vesting criteria expected to vest	324,000		324,000
Number of RSUs with performance-based vesting criteria expected to vest	233,000		233,000
Number of RSUs with performance-based vesting criteria expected to vest	276,000		276,000
Outstanding:
Balance (in shares)			87,000
Granted (in shares)			10,000
Granted (in dollars per share)			$ 9.33
Redeemed for common stock			0
Balance (in shares)	97,000		97,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	20	(245)	47	(125)
Unrecognized Compensation Cost	44		44
Weighted Average Remaining Amortization Periods			10 months 24 days
Equity Awards Vested Upon The Passing Of Dr. Felix Zandman				77,334
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	1,133	3,573	2,268	4,639
Unrecognized Compensation Cost	7,431		7,431
Weighted Average Remaining Amortization Periods			1 year 7 months 6 days
Equity Awards Vested Upon The Passing Of Dr. Felix Zandman				98,375
Phantom Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense recognized	0	0	93	222
Unrecognized Compensation Cost	$ 0		$ 0
Weighted Average Remaining Amortization Periods			0 years
Maximum number of shares granted under restricted stock, unrestricted stock, RSU's and stock options to officers, employees and employee directors (in shares)	300,000		300,000
Performance Vested Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Awards Vested Upon The Passing Of Dr. Felix Zandman				202,330