Commitments and Contingencies (Narrative) (Details) $ in Thousands	2 Months Ended	12 Months Ended
	Mar. 23, 2017 USD ($) lease	Jan. 28, 2017 USD ($)	Jan. 30, 2016 USD ($)	Jan. 31, 2015 USD ($)
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		2031
Rent expense		$ 78,500	$ 66,000	$ 53,600
Contingent rents		500	$ 600	$ 500
Operating Leases, Future Minimum Payments Due		813,291
Purchase commitments		4,600
Key Employees [Member]
Commitments and Contingencies [Line Items]
Maximum additional payments upon employee separation		$ 6,500
Subsequent Event [Member]
Commitments and Contingencies [Line Items]
Operating lease agreement extension term (years)	15 years
Number Of Leases | lease	17
Average Lease Term Period	10 years
Operating Leases, Future Minimum Payments Due	$ 34,600