Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 85,903	$ 70,816
Less: accumulated depreciation and amortization	(38,693)	(30,669)
Total property and equipment, net	47,210	40,147
Computers, Software, and Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	5,391	4,835
Site Operation Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	19,000	14,793
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	1,480	917
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	30,169	22,217
Capitalized Software Development Costs
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 29,863	$ 28,054