Acquisition and Non-Acquisition Related Restructuring Reserve (Detail) (Non-Acquisition Related Restructuring Plans, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,186	$ 4,920	$ 7,482
Accrual adjustment		(681)
Accrued	3,475	4,958	4,267
Costs incurred	(2,642)	(7,966)	(6,945)
Foreign currency impact and other	(60)	(45)	116
Balance at March 31, 2012	1,959	1,186	4,920
Employee Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1,186	4,920	7,482
Accrual adjustment		(681)
Accrued	3,093	4,958	4,267
Costs incurred	(2,485)	(7,966)	(6,945)
Foreign currency impact and other	(56)	(45)	116
Balance at March 31, 2012	1,738	1,186	4,920
Plant Closure and Other
Restructuring Cost and Reserve [Line Items]
Accrued	382
Costs incurred	(157)
Foreign currency impact and other	(4)
Balance at March 31, 2012	$ 221