Debt (Details) (USD $) In Millions, unless otherwise specified		9 Months Ended					0 Months Ended		0 Months Ended
	Nov. 02, 2013 Credit Agreement	Nov. 02, 2013 Credit Agreement Maximum	Nov. 02, 2013 Credit Agreement Minimum	Nov. 02, 2013 Credit Agreement Federal funds rate	Nov. 02, 2013 Credit Agreement LIBOR	Nov. 02, 2013 Senior revolving credit facility	Aug. 06, 2013 Term loan	Aug. 06, 2013 Term loan Interest rate swap	Aug. 06, 2013 Term loan LIBOR
Line of credit facility
Amount borrowed							$ 100.0
Period of repayment of term loan							5 years
Annual principal payment (as a percent)							10.00%
Alternate base rate (as a percent)				federal funds rate	one month LIBO rate				monthly LIBOR
Base rate margin (as a percent)				0.50%	1.00%				1.75%
Notional amount of interest rate swap								100.0
Fixed rate of interest (as a percent)								1.27%
Combined interest rate (as a percent)							3.02%
Total credit facility						300.0
Total credit facility with expansion feature						450.0
Varying interest rate margin (as a percent)		2.50%
Fees on amounts available to be drawn (as a percent)		2.50%	1.75%
Fees on unused commitments (as a percent)		0.50%	0.35%
Borrowings under the senior revolving credit facility						0
Letters of credit issued and outstanding	22.6
Borrowings available under credit facility	$ 277.4