Earnings Per Share (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Earnings Per Share [Abstract]
Net income	$ 11,650	$ 12,581	$ 52,234	$ 51,221
Basic weighted average common shares outstanding	18,747,000	20,844,000	19,339,000	21,488,000
Potential common shares for stock options and restricted stock	52,000	33,000	40,000	37,000
Diluted weighted average common shares outstanding	18,799,000	20,877,000	19,379,000	21,525,000
Basic	$ 0.62	$ 0.60	$ 2.70	$ 2.38
Diluted	$ 0.62	$ 0.60	$ 2.70	$ 2.38
Shares excluded from computation of earnings per share due to antidilutive effect	37,531	54,270	45,022	119,267