Lease Termination and Impairment Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 31, 2014	Jun. 01, 2013
Lease termination and impairment charges
Lease termination and impairment charges	$ 4,848	$ 10,972
Impairment charges
Lease termination and impairment charges
Lease termination and impairment charges	151	4,601
Lease termination
Lease termination and impairment charges
Lease termination and impairment charges	4,697	6,371
Closed store and distribution center charges
Balance-beginning of period	284,270	323,758
Provision for present value of noncancellable lease payments of closed stores	142	393
Changes in assumptions about future sublease income, terminations and changes in interest rates	(427)	520
Interest accretion	4,982	5,458
Cash payments, net of sublease income	(18,645)	(18,118)
Balance-end of period	$ 270,322	$ 312,011