Accounting for Sharebased Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Dec. 01, 2012	Dec. 03, 2011
Assumptions to calculate fair value options [Abstract]
Expected life	4 years 9 months	4 years 9 months	4 years 9 months
Weighted-average expected volatility	47.28%	51.60%	52.13%
Expected volatility (Low)	39.25%	48.79%	50.45%
Expected volatility (High)	48.02%	51.76%	52.30%
Risk-free interest rate	0.77%	0.71%	1.87%
Expected dividend yield	0.87%	1.05%	1.31%
Weighted-average fair value of grants	$ 15.05	$ 11.52	$ 9.10
Share-based compensation expense recognition [Abstract]
Share-based compensation expense	$ 12,317	$ 9,728	$ 7,741
APIC Pool for tax deficiencies	15,005
Excess tax benefit recognized	2,676	1,263	1,140
Unrecognized compensation costs related to unvested stock option awards	7,465
The weighted average period over which unrecognized share-based compensation costs are expected to be reported.	1 year 6 months
Unrecognized compensation costs related to unvested restricted stock awards	1,967
The weighted average period over which unrecognized compensation costs related to unvested restricted stock awards	1 year 2 months 12 days
Summary of option activity [Roll Forward]
Outstanding beginning balance	2,429,750	2,423,366
Granted	493,173	548,449
Exercised	(462,427)	(430,000)	(538,709)
Forfeited or Cancelled	(30,535)	(112,065)
Outstanding ending balance	2,429,961	2,429,750	2,423,366
Weighted-average exercise price activity [Abstract]
Outstanding beginning balance	$ 21.63	$ 19.29
Granted	$ 40.07	$ 28.75
Exercised	$ 19.23	$ 17.42
Forfeited or Cancelled	$ 28.57	$ 22.03
Outstanding ending balance	$ 25.74	$ 21.63	$ 19.29
Nonvested Restricted Activity [Line Items]
Nonvested beginning balance	386,415	398,879
Restricted shares granted	249,053	216,963
Vested	(179,857)	(187,598)
Forfeited	(7,935)	(41,829)
Nonvested ending balance	447,676	386,415	398,879
Fair value of nonvested restricted stock	6,807	4,626	4,447
Total fair value of nonvested restricted stock	9,269
Schedule Of Share Based Compensation Nonemployee Director Stock Award Plan Activity Units [Line Items]
Units outstanding beginning	407,431	391,833
Participant contributions	16,444	19,051
Company match contributions	15,058	21,013
Payouts	(64,965)	(24,466)
Units outstanding ending	373,968	407,431	391,833
Directors Deferred Compensation 10 Percent Match	0.10
Other Share Based Activity [Abstract]
Fair values of options granted	7,425	6,318	4,878
Total intrinsic value of options exercised	9,842	5,191	4,231
Proceeds received from option exercises	8,891
Repurchased restricted stock shares	62,124	54,289	48,675
Non Employee Directors [Member]
Schedule Of Share Based Compensation Nonemployee Director Stock Award Plan Activity Units [Line Items]
Units outstanding beginning	338,769	314,560
Participant contributions	14,145	15,836
Company match contributions	14,802	20,414
Payouts	(55,036)	(12,041)
Units outstanding ending	312,680	338,769
Deferred compensation units paid as discretionary awards	11,908	18,030
Fair value of company match	49	78	78
Fair value of discretionary award	480	560	490
Employees [Member]
Schedule Of Share Based Compensation Nonemployee Director Stock Award Plan Activity Units [Line Items]
Units outstanding beginning	68,662	77,273
Participant contributions	2,299	3,215
Company match contributions	256	599
Payouts	(9,929)	(12,425)
Units outstanding ending	61,288	68,662
Fair value of company match	$ 8	$ 14	$ 14
Nonvested restricted stock units [Member]
Nonvested Restricted Activity [Line Items]
Nonvested beginning balance	141,184	127,117
Restricted shares granted	62,701	88,536
Vested	(66,446)	(52,788)
Forfeited	(2,208)	(21,681)
Nonvested ending balance	135,231	141,184
Nonvested restricted stock shares [Member]
Nonvested Restricted Activity [Line Items]
Nonvested beginning balance	245,231	271,762
Restricted shares granted	186,352	128,427	145,038
Vested	(113,411)	(134,810)
Forfeited	(5,727)	(20,148)	(90,154)
Nonvested ending balance	312,445	245,231	271,762
Weighted Average Grant Date Fair Value [Member]
Nonvested Restricted Activity [Line Items]
Total Nonvested Restricted Stock Weighted Average Beginning	$ 33.76	$ 25.41	$ 23.18
Granted weighted average grant date fair value	$ 39.66	$ 28.64
Vested weighted average grant date fair value	$ 37.85	$ 24.66
Forfeited weighted average grant date fair value	$ 32.17	$ 24.78
Total Nonvested Restricted Stock Weighted Average Ending	$ 33.76	$ 25.41	$ 23.18
Nonvested restricted stock weighted average remaining contractual life (in years) [Member]
Nonvested Restricted Activity [Line Items]
Weighted Average Remaining Contractual Life Beginning	1 year 2 months 12 days	10 months 24 days	1 year
Weighted Average Remaining Contractual Life Granted	1 year 8 months 12 days	2 years 2 months 12 days
Weighted Average Remaining Contractual Life Forfeited	1 year 4 months 24 days	1 year 7 months 6 days
Weighted Average Remaining Contractual Life Vested	0 years	0 years
Weighted Average Remaining Contractual Life Ending	1 year 2 months 12 days	10 months 24 days	1 year
Stock Option [Member]
Nonvested Restricted Activity [Line Items]
Vesting Schedule			33.3%
Maximum Share Based Contractual Term	10 years
Restricted Stock [Member]
Nonvested Restricted Activity [Line Items]
Vesting Schedule	33.3%