Revised Financial Statements - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended									6 Months Ended
	Jun. 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	Jun. 30, 2015	Jun. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ (10,463)			$ 7,657						$ (18,076)	$ 9,624
Deferred income tax provision (benefit)										(6,713)	204
Cash provided by operating activities										$ 20,422	16,405
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		9,624
Deferred income tax provision (benefit)											204
Cash provided by operating activities											16,405
Valuation Allowance of Deferred Tax Assets | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income				8,732							12,797
Deferred income tax provision (benefit)											(2,969)
Cash provided by operating activities											16,405
Valuation Allowance of Deferred Tax Assets | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income				$ (1,075)							(3,173)
Deferred income tax provision (benefit)											3,173
Cash provided by operating activities											$ 0