Fair Value Measurements - Additional Disclosures (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Cash equivalents	$ 0					$ 0		$ 0
Impairment of property and equipment	0		$ 14,600,000		$ 2,300,000
Impairment intangible assets	0		9,200,000	$ 0			$ 0
Impairments of goodwill	$ 0	$ 0	$ 0	$ 0		$ 0	$ 0