Change in Fair Value of Contingent Consideration as Determined by Level 3 Inputs (Detail) - Contingent Consideration - ECP Entwicklungsgesellschaft mbH - Level 3 $ in Thousands	3 Months Ended
	Jun. 30, 2015 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at March 31, 2015	$ 6,510
Additions	0
Payments	0
Change in fair value	151
Balance at June 30, 2015	$ 6,661