Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value as of Measurement Date (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Feb. 29, 2016	Feb. 28, 2015
Assets measured on a recurring basis:
Deferred compensation plan assets	$ 11,158	$ 12,745
Investment in equity securities	33,230
Assets measured on a recurring basis	44,388
Liabilities measured on a recurring basis:
Deferred compensation plan liabilities	12,064	13,412
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets measured on a recurring basis:
Deferred compensation plan assets	9,936	10,997
Investment in equity securities	33,230
Assets measured on a recurring basis	43,166
Liabilities measured on a recurring basis:
Deferred compensation plan liabilities	9,936	10,997
Level 2 [Member]
Assets measured on a recurring basis:
Deferred compensation plan assets	1,222	1,748
Assets measured on a recurring basis	1,222
Liabilities measured on a recurring basis:
Deferred compensation plan liabilities	$ 2,128	$ 2,415