Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 184,559	$ 165,566
Less: accumulated depreciation and amortization	(92,223)	(84,824)
Total property and equipment, net	92,336	80,742
Computers, software, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	11,522	11,245
Site operation equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	78,748	66,727
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	4,431	3,990
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	45,128	40,541
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 44,730	$ 43,063