Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2010	$ 60	$ 308,598	$ (65,489)	$ (124,898)	$ (5,031)	$ 113,240
Balance, Shares at Dec. 31, 2010	60,099		(18,838)
Issuance of common stock	1	763				764
Issuance of common stock, Shares	1,216
Treasury stock purchased			(8,955)			(8,955)
Treasury stock purchased, Shares			(2,333)
Issuance of restricted stock units, net of Cancellations		(385)				(385)
Amortization of restricted stock units and common stock subject to vesting requirements		4,226				4,226
Net income				21,769		21,769
Foreign currency translation					(411)	(411)
Total comprehensive income						21,358
Balance at Dec. 30, 2011	61	313,202	(74,444)	(103,129)	(5,442)	130,248
Ending Balance, Shares at Dec. 30, 2011	61,315		(21,171)
Issuance of common stock	2	231				233
Issuance of common stock, Shares	1,921
Common stock purchased through Tender Offer	(11)	(55,576)				(55,587)
Common stock purchased through Tender Offer, Shares	(11,000)
Amortization of restricted stock units and common stock subject to vesting requirements		5,278				5,278
Dividend payment				(3,081)		(3,081)
Net income				16,697		16,697
Foreign currency translation					938	938
Total comprehensive income						17,635
Balance at Dec. 28, 2012	52	263,135	(74,444)	(89,513)	(4,504)	94,726
Ending Balance, Shares at Dec. 28, 2012	52,236		(21,171)
Issuance of common stock	1	(95)				(94)
Issuance of common stock, Shares	890
Common stock purchased through Tender Offer	(1)	(7,169)				(7,170)
Common stock purchased through Tender Offer, Shares	(983)
Treasury stock purchased			(5,962)			(5,962)
Treasury stock purchased, Shares			(1,018)			(22,200,000)
Amortization of restricted stock units and common stock subject to vesting requirements		5,990				5,990
Dividend payment				(3,096)		(3,096)
Net income				8,729		8,729
Foreign currency translation					53	53
Total comprehensive income						8,782
Balance at Dec. 27, 2013	$ 52	$ 261,861	$ (80,406)	$ (83,880)	$ (4,451)	$ 93,176
Ending Balance, Shares at Dec. 27, 2013	52,143		(22,189)