Reconciliation of Restructuring Reserve (Detail) (Acquisition Related Restructuring Reserve, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 403	$ 1,292
Accrued	711	2,546
Costs incurred	(1,114)	(3,420)
Foreign currency impact and other		(15)
Balance at March 31, 2012		403
Employee Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance	257	1,292
Accrued	81	108
Costs incurred	(338)	(1,107)
Foreign currency impact and other		(36)
Balance at March 31, 2012		257
Plant Closure and Other
Restructuring Cost and Reserve [Line Items]
Beginning Balance	146
Accrued	630	2,438
Costs incurred	(776)	(2,313)
Foreign currency impact and other		21
Balance at March 31, 2012		$ 146