Revised Financial Statements - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended									9 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
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ (14,263)		$ 75							$ (32,339)	$ 9,699
Deferred income tax provision (benefit)										(5,230)	408
Cash provided by operating activities										$ 22,472	30,789
Valuation Allowance of Deferred Tax Assets
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		$ (33,462)	75	$ 7,657	$ 1,967	$ 4,087	$ 1,495	$ 538	$ 1,207		9,699
Deferred income tax provision (benefit)											408
Cash provided by operating activities											30,789
Valuation Allowance of Deferred Tax Assets | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income			(945)								11,852
Deferred income tax provision (benefit)											(1,745)
Cash provided by operating activities											30,789
Valuation Allowance of Deferred Tax Assets | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income			$ 1,020								(2,153)
Deferred income tax provision (benefit)											2,153
Cash provided by operating activities											$ 0