Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 206,253	$ 165,566
Less: accumulated depreciation and amortization	(101,213)	(84,824)
Total property and equipment, net	105,040	80,742
Computers, software, and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	12,945	11,245
Site operation equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	102,995	66,727
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	4,659	3,990
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	37,839	40,541
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 47,815	$ 43,063