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Income Taxes (Income Tax Components) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Document Fiscal Year Focus	2014
Current:
Federal	$ 28,581us-gaap_CurrentFederalTaxExpenseBenefit	$ 26,284us-gaap_CurrentFederalTaxExpenseBenefit	$ 15,201us-gaap_CurrentFederalTaxExpenseBenefit
State	5,060us-gaap_CurrentStateAndLocalTaxExpenseBenefit	4,910us-gaap_CurrentStateAndLocalTaxExpenseBenefit	2,436us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign	2,181us-gaap_CurrentForeignTaxExpenseBenefit	1,204us-gaap_CurrentForeignTaxExpenseBenefit	2,726us-gaap_CurrentForeignTaxExpenseBenefit
Total Current	35,822us-gaap_CurrentIncomeTaxExpenseBenefit	32,398us-gaap_CurrentIncomeTaxExpenseBenefit	20,363us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	15,991us-gaap_DeferredFederalIncomeTaxExpenseBenefit	4,244us-gaap_DeferredFederalIncomeTaxExpenseBenefit	6,358us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Foreign	(256)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	(84)us-gaap_DeferredForeignIncomeTaxExpenseBenefit	(579)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total Deferred	15,735us-gaap_DeferredIncomeTaxExpenseBenefit	4,160us-gaap_DeferredIncomeTaxExpenseBenefit	5,779us-gaap_DeferredIncomeTaxExpenseBenefit
Total	$ 51,557us-gaap_IncomeTaxExpenseBenefit	$ 36,558us-gaap_IncomeTaxExpenseBenefit	$ 26,142us-gaap_IncomeTaxExpenseBenefit

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