Revised Financial Statements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended									9 Months Ended		12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill impairments										$ 0		$ 36,666
Provision for income taxes	$ 2,393		$ 517							$ (4,267)	$ 1,094
Valuation Allowance of Deferred Tax Assets
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill impairments		$ 36,700
Foreign tax benefit		1,700
Provision for income taxes			517								1,094
Valuation Allowance of Deferred Tax Assets | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Provision for income taxes		$ (2,200)	$ (1,020)	$ 1,100	$ 2,100	$ 700	$ 700	$ 300	$ 1,800		$ 2,153