Property and Equipment, net - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Capital Leased Assets [Line Items]
Depreciation and amortization expense	$ 18.8	$ 11.2	$ 6.4
Vehicles
Capital Leased Assets [Line Items]
Gross amount of assets under capital leases	46.2	34.2
Accumulated depreciation for assets under capital leases	16.3	6.2
Depreciation of capital leased asset	$ 10.8	$ 4.9	$ 1.2