Quarterly Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 01, 2012	Sep. 01, 2012	Jun. 01, 2012	Mar. 01, 2012	Dec. 03, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010
Quarterly Data (unaudited) [Abstract]
Net revenue	$ 513,255	$ 500,535	$ 526,995	$ 345,454	$ 401,545	$ 363,071	$ 368,360	$ 311,109	$ 1,886,239	$ 1,444,085	$ 1,256,825
Gross profit	143,714	134,324	136,551	102,687	112,260	103,013	102,964	85,595	517,276	403,832	358,171
Selling, general and administrative expenses	(95,395)	(91,355)	(92,956)	(75,029)	(76,679)	(72,052)	(70,136)	(68,004)	(354,735)	(286,871)	(263,551)
Special charges	(9,204)	(4,654)	(32,127)	(6,482)	(7,499)	0	0	0	(52,467)	(7,499)	0
Asset impairment charges	(846)	0	(671)	0	0	0	0	(332)	(1,517)	(332)	(8,785)
Income from continuing operations	$ 25,012	$ 24,607	$ 5,060	$ 13,608	$ 22,035	$ 22,177	$ 24,228	$ 11,775	$ 68,287	$ 80,215	$ 64,293
Income from continuing operations - basic	$ 0.50	$ 0.49	$ 0.10	$ 0.276	$ 0.46	$ 0.45	$ 0.49	$ 0.24	$ 1.37	$ 1.64	$ 1.33
Income from continuing operations - diluted	$ 0.49	$ 0.48	$ 0.10	$ 0.27	$ 0.44	$ 0.44	$ 0.49	$ 0.24	$ 1.34	$ 1.61	$ 1.31
Weighted Average Number Of Shares Outstanding Basic And Diluted [Abstract]
Basic	49,640	49,627	49,652	49,365	48,937	49,000	49,021	49,006	49,571	48,991	48,599
Diluted	50,798	50,699	50,722	50,253	49,821	49,917	49,850	49,877	50,618	49,866	49,608