Commitments and Contingencies (Narrative) (Details) $ in Thousands	2 Months Ended	12 Months Ended
	Mar. 23, 2016 USD ($) lease	Jan. 30, 2016 USD ($)	Jan. 31, 2015 USD ($)	Feb. 01, 2014 USD ($)
Commitments and Contingencies [Line Items]
Lease renewal period, minimum (years)		5 years
Operating lease agreement extension term (years)		10 years
Operating lease agreement expiration period		2025
Rent expense		$ 66,000	$ 53,600	$ 41,800
Contingent rents		600	$ 500	$ 500
Operating Leases, Future Minimum Payments Due		616,825
Purchase commitments		3,700
Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Number Of Leases | lease	14
Average Lease Term Period	10 years
Operating Leases, Future Minimum Payments Due	$ 25,000
Key Employees [Member]
Commitments and Contingencies [Line Items]
Maximum additional payments upon employee separation		$ 4,100