Pension Plan - Schedule of Accumulated Benefit Obligation, Change in Projected Benefit Obligation, Change in Plan Assets, Funded Status, and Reconciliation to Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at beginning of year	$ 56,243	$ 60,845
Service cost	1,166	1,301	$ 1,122
Interest cost	2,372	2,369	2,447
Actuarial (gain)/loss	2,479	(2,661)
Other assumption change	(730)	(1,603)
Benefits paid	(3,872)	(4,008)
Projected benefit obligation at end of year	57,658	56,243	60,845
Change in plan assets:
Fair value of plan assets at beginning of year	47,547	50,993
Company contributions	3,000	3,000
Gain (loss) on plan assets	6,137	(2,438)
Benefits paid	(3,872)	(4,008)
Fair value of plan assets at end of year	52,812	47,547	$ 50,993
Unfunded status	(4,846)	(8,696)
Accumulated benefit obligation at end of year	$ 53,590	$ 51,948