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	12 Months Ended
	Mar. 31, 2015
Contingent Consideration | ECP Entwicklungsgesellschaft mbH | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	$ 6,000
Payments	0
Change in fair value	510
Ending balance	$ 6,510