Components of Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Stockholders Equity [Line Items]
Pension funded status adjustment, Beginning Balance	$ (8,982)	$ (3,512)	$ (5,479)
Unrealized gain (loss) on derivative instruments, Beginning Balance	1,175	4,436	(5,034)
Foreign currency translation adjustment, Beginning Balance	81,900	114,256	77,717
Accumulated other comprehensive income, Beginning Balance	74,093	115,180	67,204
Pension funded status adjustment, Before-Tax Amount	(5,382)	(7,311)	2,761
Unrealized gain (loss) on derivative instruments, Before-Tax Amount	(3,141)	(5,170)	14,721
Foreign currency translation adjustment, Before-Tax Amount	(27,244)	(32,356)	36,539
Accumulated other comprehensive income, Before-Tax Amount	(35,767)	(44,837)	54,021
Pension funded status adjustment, Tax Benefit (Expense)	1,195	1,841	(794)
Unrealized gain (loss) on derivative instruments, Tax Benefit (Expense)	1,134	1,909	(5,251)
Foreign currency translation adjustment, Tax Benefit (Expense)
Accumulated other comprehensive income, Tax Benefit (Expense)	2,329	3,750	(6,045)
Pension funded status adjustment, Net-of-Tax Amount	(4,187)	(5,470)	1,967
Unrealized gain (loss) on derivative instruments, Net-of-Tax Amount	(2,007)	(3,261)	9,470
Foreign currency translation adjustment, Net-of-Tax Amount	(27,244)	(32,356)	36,539
Accumulated other comprehensive income, Net-of-Tax Amount	(33,438)	(41,087)	47,976
Pension funded status adjustment, Ending Balance	(13,169)	(8,982)	(3,512)
Unrealized gain (loss) on derivative instruments, Ending Balance	(832)	1,175	4,436
Foreign currency translation adjustment, Ending Balance	54,656	81,900	114,256
Accumulated other comprehensive income, Ending Balance	$ 40,655	$ 74,093	$ 115,180