Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 04, 2013
Line of credit facility
Borrowings under revolving credit facility	21.3
Borrowings available under credit facility	278.7
Alternate base rate based on the federal funds rate
Line of credit facility
Alternate base rate (as a percent)	federal funds rate
Alternate base rate margin (as a percent)	0.50%
Alternate base rate based on the adjusted LIBOR rate
Line of credit facility
Alternate base rate (as a percent)	one month LIBO rate
Alternate base rate margin (as a percent)	1.00%
Credit Agreement
Line of credit facility
Total senior revolving credit facility	300.0
Total senior revolving credit facility, expandable	450.0
Term loan	100.0
Period after the closing date during which amount is available in single advance	120 days
Period of repayment of term loan	5 years
Annual principal payment (as a percent)	10.00%
Borrowings under revolving credit facility	0
Credit Agreement | Maximum
Line of credit facility
Varying interest rate margin (as a percent)	2.50%
Fees on amounts available to be drawn (as a percent)	2.50%
Fees on unused commitments (as a percent)	0.50%
Credit Agreement | Minimum
Line of credit facility
Fees on amounts available to be drawn (as a percent)	1.75%
Fees on unused commitments (as a percent)	0.35%