Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before income tax expense (benefit)	$ 113,226	$ 85,914	$ 97,815
Tax benefit	(62,704)	(35,996)	(40,617)
Net income	50,522	49,918	57,198
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(2,915)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Pensions and Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses, net	(2,442)
Prior service credit, net	1,113
Transition obligation	(6)
Recognition of prior service cost upon curtailment	(1,746)
Income (loss) before income tax expense (benefit)	(3,081)
Tax benefit	1,150
Net income	(1,931)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Foreign Currency Translation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss upon dissolution of business	(984)
Tax benefit
Net income	$ (984)