Fair Value Measurements - Narrative (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2016 USD ($) Financial_Institution	Sep. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of financial institutions with certificates of deposit investments | Financial_Institution		2
Time deposits, $250,000 or more		$ 250
Note receivable					$ 1,000
Interest rate					8.00%
Impairment of property, equipment, inventory and intangibles		517	$ 2,515
Property and equipment	$ 2,040	1,062
Disposed of by Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of property, equipment, inventory and intangibles	300	$ 500
Proceeds from sale of impaired assets	600
Gain (loss) on sale of impaired assets	0
Property and equipment	100			$ 500
Proceeds from sale of assets	300
Gain on disposition of assets	$ 200