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, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Change in benefit obligation
Projected benefit obligation at beginning of year	$ 54,315	$ 49,496
Service cost	1,262	1,283	1,214
Interest cost	2,402	2,402	2,523
Actuarial (gain)/loss	(3,095)	3,579
Benefits paid	(3,545)	(2,445)
Projected benefit obligation at end of year	51,339	54,315	49,496
Change in plan assets:
Fair value of plan assets at beginning of year	44,974	42,002
Company contributions	3,000	3,000
Gains on plan assets	4,995	2,418
Benefits paid	(3,545)	(2,445)
Fair value of plan assets at end of year	49,424	44,974	42,002
Funded status (benefit obligation less plan assets)	(1,915)	(9,341)
Accumulated benefit obligation at end of year	$ 46,815	$ 49,791