Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Disclosure Assets And Liabilities Measured At Fair Value On Recurring Basis [Abstract]
Goodwill impairment	$ 81,900	$ 34,700	$ 81,900	$ 81,877	$ 34,703