Property and Equipment - Additional Disclosures (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	$ 2,300,000		$ 3,400,000	$ 5,400,000	$ 6,800,000