Consolidated Statements Of Stockholders' Equity And Comprehensive Income (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance, value at Jan. 02, 2010	$ 15	$ 16,425	$ 56,410	$ 1,523	$ 74,373
Balance, shares at Jan. 02, 2010	15,309
Comprehensive income
Net earnings			33,260		33,260
Foreign currency translation adjustment, net of tax benefit				2,305	2,305
Comprehensive income					35,565
Common stock repurchased and retired, shares	(199)
Common stock repurchased and retired, value		(2,232)	(6,398)		(8,630)
Common stock issued in connection with acquisition, shares	400
Common stock issued in connection with acquisition, value	1	17,715			17,716
Common stock issued under equity award plans, including, shares	250
Common stock issued under equity award plans, including tax benefit (expense), value		4,690			4,690
Equity-based compensation expense		7,107			7,107
Balance, value at Oct. 02, 2010	16	43,705	83,272	3,828	130,821
Balance, shares at Oct. 02, 2010	15,760
Balance, value at Jan. 01, 2011	16	51,222	90,207	5,357	146,802
Balance, shares at Jan. 01, 2011	15,985				15,985
Comprehensive income
Net earnings			37,591		37,591
Foreign currency translation adjustment, net of tax benefit				763	763
Comprehensive income					38,354
Common stock repurchased and retired, shares	(1,095)
Common stock repurchased and retired, value	(1)	(11,072)	(21,628)		(32,701)
Common stock issued under equity award plans, including, shares	64
Common stock issued under equity award plans, including tax benefit (expense), value		(270)			(270)
Equity-based compensation expense		7,739			7,739
Tax impact of cancelled vested equity awards		(785)			(785)
Balance, value at Oct. 01, 2011	$ 15	$ 46,834	$ 106,170	$ 6,120	$ 159,139
Balance, shares at Oct. 01, 2011	14,954				14,954