Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Jan. 02, 2015	$ 89,788	$ 53	$ 264,912	$ (91,335)	$ (77,677)	$ (6,165)
Balance, Shares at Jan. 02, 2015		53,203		(23,989)
Issuance of common stock	(1,542)	$ 1	(1,543)
Issuance of common stock, Shares		644
Treasury stock purchased	(1,356)			$ (1,356)
Treasury stock purchased, Shares				(149)
Amortization of restricted stock units and common stock subject to vesting requirements	9,518		9,518
Dividends declared	(6,266)				(6,266)
Net income	13,809				13,809
Foreign currency translation	(1,807)					(1,807)
Balance at Jan. 01, 2016	102,144	$ 54	272,887	$ (92,691)	(70,134)	(7,972)
Ending Balance, Shares at Jan. 01, 2016		53,847		(24,138)
Issuance of common stock	(3,031)	$ 1	(3,032)
Issuance of common stock, Shares		938
Treasury stock purchased	$ (30,065)			$ (30,065)
Treasury stock purchased, Shares	(2,100)			(2,059)
Amortization of restricted stock units and common stock subject to vesting requirements	$ 7,245		7,245
Dividends declared	(7,988)				(7,988)
Net income	21,541				21,541
Foreign currency translation	(3,577)					(3,577)
Balance at Dec. 30, 2016	86,269	$ 55	277,100	$ (122,756)	(56,581)	(11,549)
Ending Balance, Shares at Dec. 30, 2016		54,785		(26,197)
Issuance of common stock	(3,210)	$ 1	(3,211)
Issuance of common stock, Shares		960
Treasury stock purchased	$ (11,298)			$ (11,298)
Treasury stock purchased, Shares	(748)			(748)
Amortization of restricted stock units and common stock subject to vesting requirements	$ 14,408		14,408
Dividends declared	(9,288)				(9,288)
Net income	27,354				27,354
Foreign currency translation	3,040					3,040
Balance at Dec. 29, 2017	$ 107,275	$ 56	$ 288,297	$ (134,054)	$ (38,515)	$ (8,509)
Ending Balance, Shares at Dec. 29, 2017		55,745		(26,945)