Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Noncontrolling Interest [Member]	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Comprehensive Income [Member]
Balance at Dec. 28, 2008	$ 204,978	$ 731	$ 170	$ 0	$ 180,189	$ 0	$ 23,888
Balance (in shares) at Dec. 28, 2008			17,038,000
Comprehensive income (loss):
Net income	2,107	39					2,068	2,107
Net unrealized gains (losses) on cash flow hedge:
Unrealized gains, net of tax				242				242
Reclassification adjustment realized in net income, net of tax expense				(600)				(600)
Comprehensive Income	1,749							1,749
Non-cash stock-based compensation	3,433				3,433
Issuance of common stock	258		0		258
Issuance of common stock (in shares)			103,000
Balance at Jan. 03, 2010	210,418	770	170	(358)	183,880	0	25,956
Balance (in shares) at Jan. 03, 2010			17,141,000
Comprehensive income (loss):
Net income	789	3					786	789
Net unrealized gains (losses) on cash flow hedge:
Unrealized gains, net of tax				1,266				1,266
Reclassification adjustment realized in net income, net of tax expense				(908)				(908)
Comprehensive Income	1,147							1,147
Non-cash stock-based compensation	2,825				2,825
Issuance of common stock, net of shares repurchased	173		2		216	(45)
Issuance of common stock, net of shares repurchased (in shares)			220,000
Balance at Jan. 02, 2011	214,563	773	172	0	186,921	(45)	26,742
Balance (in shares) at Jan. 02, 2011	17,361,406		17,361,000
Comprehensive income (loss):
Net income	47,471	14					47,457	47,471
Net unrealized gains (losses) on cash flow hedge:
Comprehensive Income	47,471							47,471
Non-cash stock-based compensation	3,588				3,588
Issuance of common stock	78,897		38		78,859
Issuance of common stock (in shares)			3,982,000
Repurchase of common stock	(9,584)					(9,584)
Repurchase of common stock (in shares)			(528,000)
Balance at Jan. 01, 2012	$ 334,935	$ 787	$ 210	$ 0	$ 269,368	$ (9,629)	$ 74,199
Balance (in shares) at Jan. 01, 2012	20,814,800		20,815,000