Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies - Supplemental Cash Flow Disclosures (Details) (USD $)	3 Months Ended
	Apr. 28, 2012	Apr. 30, 2011
Supplemental disclosure of cash flow information:
Cash paid for interest, including capital leases	$ 193,000	$ 36,000
Cash paid for income taxes, excluding impact of refunds	40,570,000	31,269,000
Non-cash activity:
Assets acquired under capital leases	0	130,000
Accrued property and equipment	9,909,000	8,060,000
Share repurchases payable	36,395,000	0
Proceeds from Long-term Lines of Credit	83,600,000
Repayments of Long-term Lines of Credit	$ 149,500,000