Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Administrative and general expenses	$ (289,433)	$ (297,443)	$ (298,569)
Income (loss) before income tax expense (benefit)	110,706	113,226	85,914
Income tax expense	(45,599)	(62,704)	(35,996)
Net income	65,107	50,522	49,918
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(496)	(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]
Income (loss) before income tax expense (benefit)	(673)	(3,081)
Income tax expense	177	1,150
Net income	(496)	(1,931)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Pensions and Postretirement Benefits [Member] | Actuarial Losses, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Administrative and general expenses	(1,392)	(2,442)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Pensions and Postretirement Benefits [Member] | Prior Service Credit, Net [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Administrative and general expenses	724	1,113
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Pensions and Postretirement Benefits [Member] | Transition Obligation [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Administrative and general expenses	(5)	(6)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Pensions and Postretirement Benefits [Member] | Recognition of Prior Service Cost Upon Curtailment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Administrative and general expenses		(1,746)
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)