Retirement and Postretirement Benefit Plans - Summary of Amounts Recognized on Consolidated Statement of Financial Position (Detail) - USD ($) $ in Thousands	Feb. 29, 2016	Feb. 28, 2015
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued compensation and benefits	$ (2,647)	$ (2,639)
Other liabilities	(80,239)	(81,861)
Net amount recognized	(82,886)	(84,500)
Amounts recognized in accumulated other comprehensive (income) loss:
Net actuarial loss (gain)	69,217	68,372
Net transition obligation	10	16
Accumulated other comprehensive loss (income)	69,227	68,388
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other liabilities	(17,762)	(17,542)
Net amount recognized	(17,762)	(17,542)
Amounts recognized in accumulated other comprehensive (income) loss:
Net actuarial loss (gain)	(20,472)	(19,396)
Net prior service cost (credit)	(3,473)	(4,173)
Accumulated other comprehensive loss (income)	$ (23,945)	$ (23,569)