Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
U.S. federal	$ 27,521us-gaap_CurrentFederalTaxExpenseBenefit	$ 27,338us-gaap_CurrentFederalTaxExpenseBenefit	$ 26,539us-gaap_CurrentFederalTaxExpenseBenefit
State	1,353	1,462	1,241
Foreign	0us-gaap_CurrentForeignTaxExpenseBenefit	(261)us-gaap_CurrentForeignTaxExpenseBenefit	0us-gaap_CurrentForeignTaxExpenseBenefit
Total Current	28,874us-gaap_CurrentIncomeTaxExpenseBenefit	28,539us-gaap_CurrentIncomeTaxExpenseBenefit	27,780us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred
U.S. federal	(7,260)	22,649	110
State	(357)	1,211	5
Foreign	1,633	(2,119)	(263)
Total Deferred	(5,984)us-gaap_DeferredIncomeTaxExpenseBenefit	21,741us-gaap_DeferredIncomeTaxExpenseBenefit	(148)us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in valuation allowance	(13,289)	(14,595)	(572)
Total	$ 9,601us-gaap_IncomeTaxExpenseBenefit	$ 35,685us-gaap_IncomeTaxExpenseBenefit	$ 27,060us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses.

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