Pension Plan - Schedule of Accumulated Benefit Obligation, Change in PBO, Change in Pension Plan Assets, Funded Status, and Reconciliation to Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Change in benefit obligation
Projected benefit obligation at beginning of year	$ 57,619	$ 57,658
Service cost	1,106	1,083	$ 1,166
Interest cost	2,274	2,270	2,372
Actuarial (gain) loss	(367)	978
Other assumption change	(120)	(423)
Benefits paid	(3,371)	(3,947)
Projected benefit obligation at end of year	57,141	57,619	57,658
Change in plan assets:
Fair value of plan assets at beginning of year	56,884	52,812
Company contributions	3,000	3,000
Gain on plan assets	1,208	5,019
Benefits paid	(3,371)	(3,947)
Fair value of plan assets at end of year	57,721	56,884	$ 52,812
Funded (unfunded) status	580	(735)
Accumulated benefit obligation at end of year	$ 52,747	$ 53,244