Reclassifications from Accumulated Other Comprehensive Loss (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2013	Sep. 01, 2012	Aug. 31, 2013	Sep. 01, 2012
Reclassification from accumulated other comprehensive loss
Income (loss) before income taxes	$ (35,037)	$ 41,631	$ (127,911)	$ 131,448
Net of income tax expense	(32,827)	38,765	(122,489)	66,853
Defined benefit pension plans | Reclassification from accumulated other comprehensive loss
Reclassification from accumulated other comprehensive loss
Income (loss) before income taxes	(1,262)	(1,019)	(2,525)	(2,039)
Net of income tax expense	(1,262)	(1,019)	(2,525)	(2,039)
Defined benefit pension plans | Reclassification from accumulated other comprehensive loss | Selling, general and administrative expenses
Reclassification from accumulated other comprehensive loss
Amortization of unrecognized prior service cost	(60)	(60)	(120)	(120)
Amortization of unrecognized net loss	$ (1,202)	$ (959)	$ (2,405)	$ (1,919)