Consolidated Condensed Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 24, 2012	Mar. 26, 2011
Consolidated Condensed Statements of Operations [Abstract]
Revenue	$ 322,807	$ 330,872
Cost of goods sold	190,614	193,075
Gross profit	132,193	137,797
Selling, general and administrative expenses	95,232	88,342
Operating profit	36,961	49,455
Other expenses:
Interest expense - net	419	226
Other expense (income) - net	946	(580)
Total other expenses (income)	1,365	(354)
Earnings (loss) before income taxes	35,596	49,809
Income taxes	4,416	13,946
Net earnings	31,180	35,863
Net earnings per share
Basic	$ 0.65	$ 0.74
Diluted	$ 0.64	$ 0.72
Comprehensive income	$ 31,029	$ 41,696
Cash dividends declared per share	$ 0.12	$ 0.12