Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 28, 2012	$ 52	$ 263,135	$ (74,444)	$ (89,513)	$ (4,504)	$ 94,726
Balance, Shares at Dec. 28, 2012	52,236		(21,171)
Issuance of common stock	$ 1	(95)				(94)
Issuance of common stock, Shares	890
Treasury stock purchased			$ (5,962)			(5,962)
Treasury stock purchased, Shares			(1,018)
Common stock purchased through Tender Offer	$ (1)	(7,169)				(7,170)
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
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)
Common stock purchased through Tender Offer, Shares	(983)
Issuance of common stock	$ 1	(1,837)				(1,836)
Issuance of common stock, Shares	1,060
Treasury stock purchased			$ (10,929)			(10,929)
Treasury stock purchased, Shares			(1,800)
Common stock purchased through Tender Offer						(11,000)
Amortization of restricted stock units and common stock subject to vesting requirements		4,888				4,888
Dividend payment				(3,508)		(3,508)
Net income				9,711		9,711
Foreign currency translation					(1,714)	(1,714)
Balance at Jan. 02, 2015	$ 53	264,912	$ (91,335)	(77,677)	(6,165)	89,788
Ending Balance, Shares at Jan. 02, 2015	53,203		(23,989)
Issuance of common stock	$ 1	(1,543)				(1,542)
Issuance of common stock, Shares	644
Treasury stock purchased			$ (1,356)			(1,356)
Treasury stock purchased, Shares			(149)
Common stock purchased through Tender Offer						(1,400)
Amortization of restricted stock units and common stock subject to vesting requirements		9,518				9,518
Dividend payment				(6,266)		(6,266)
Net income				13,809		13,809
Foreign currency translation					(1,807)	(1,807)
Balance at Jan. 01, 2016	$ 54	$ 272,887	$ (92,691)	$ (70,134)	$ (7,972)	$ 102,144
Ending Balance, Shares at Jan. 01, 2016	53,847		(24,138)