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Income Taxes - Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current	$ 26,199us-gaap_CurrentIncomeTaxExpenseBenefit	$ 20,341us-gaap_CurrentIncomeTaxExpenseBenefit	$ 18,896us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	(2,111)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,594)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,028)us-gaap_DeferredIncomeTaxExpenseBenefit
Total	$ 24,088us-gaap_IncomeTaxExpenseBenefit	$ 18,747us-gaap_IncomeTaxExpenseBenefit	$ 16,868us-gaap_IncomeTaxExpenseBenefit

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

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