Intangible Assets - Schedule of Estimated Future Amortization for Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Intangible Assets [Line Items]
Amortization of intangible assets			$ 5,879	$ 4,896
2017	$ 1,653		1,653
2018	7,233		7,233
2019	6,385		6,385
2020	6,142		6,142
2021	5,919		5,919
2022	5,484		5,484
Finite-Lived Intangible Assets
Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,900	$ 1,600	$ 5,700	$ 4,900