Property and Equipment - Additional Disclosures (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Impairment of property and equipment	$ 0	$ 14,600,000		$ 2,300,000
Depreciation expense, inclusive of expense captured in cost of revenue	$ 2,600,000		$ 3,200,000		$ 8,000,000	$ 10,000,000