Retirement and Postretirement Benefit Plans - Summary of Information Defined Benefit Pension Plans and Postretirement Benefits Plan (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Defined Benefit Pension Plans [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	$ 188,146	$ 184,344
Service cost	1,115	1,369	1,106
Interest cost	7,065	7,394	8,353
Participant contributions	20	22
Retiree drug subsidy payments
Plan amendments	414	232
Actuarial loss (gain)	6,043	6,970
Change in control	2,613
Plan curtailment	(7,164)
Benefit payments	(11,519)	(11,035)
Currency exchange rate changes	(1,947)	(1,150)
Benefit obligation at end of year	184,786	188,146	184,344
Change in plan assets:
Fair value of plan assets at beginning of year	104,521	106,341
Actual return on plan assets	11,386	7,774
Employer contributions	2,199	2,424
Participant contributions	20	22
Benefit payments	(11,519)	(11,035)
Currency exchange rate changes	(1,713)	(1,005)
Fair value of plan assets at end of year	104,894	104,521	106,341
Funded status at end of year	(79,892)	(83,625)
Postretirement Benefits Plans [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	67,452	82,344
Service cost	431	684	726
Interest cost	2,397	2,841	3,929
Participant contributions	3,485	3,963
Retiree drug subsidy payments	796	822
Plan amendments
Actuarial loss (gain)	(1,470)	(15,880)
Change in control
Plan curtailment
Benefit payments	(6,459)	(7,322)
Currency exchange rate changes
Benefit obligation at end of year	66,632	67,452	82,344
Change in plan assets:
Fair value of plan assets at beginning of year	51,794	57,563
Actual return on plan assets	3,255	1,319
Employer contributions	(3,485)	(3,729)
Participant contributions	3,485	3,963
Benefit payments	(6,292)	(7,322)
Currency exchange rate changes
Fair value of plan assets at end of year	48,757	51,794	57,563
Funded status at end of year	$ (17,875)	$ (15,658)