Property and Equipment - Additional Disclosures (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense, inclusive of expense captured in cost of revenue	$ 2,300,000	$ 1,700,000	$ 4,700,000	$ 3,200,000
Impairment of property and equipment	$ 0	$ 0	$ 0	$ 0