Change in Fair Value of Contingent Consideration as Determined by Level 3 Inputs (Detail) (Contingent Consideration, ECP Entwicklungsgesellschaft mbH, Level 3, USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2014
Contingent Consideration | ECP Entwicklungsgesellschaft mbH | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	$ 6,000
Payments
Change in fair value	219
Foreign currency translation impact	(422)
Ending balance	$ 5,797