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:
Federal	$ 14,063us-gaap_CurrentFederalTaxExpenseBenefit	$ 8,218us-gaap_CurrentFederalTaxExpenseBenefit	$ 7,181us-gaap_CurrentFederalTaxExpenseBenefit
State	2,274	1,621	1,006
Foreign	192us-gaap_CurrentForeignTaxExpenseBenefit	447us-gaap_CurrentForeignTaxExpenseBenefit	154us-gaap_CurrentForeignTaxExpenseBenefit
Total current income taxes	16,529us-gaap_CurrentIncomeTaxExpenseBenefit	10,286us-gaap_CurrentIncomeTaxExpenseBenefit	8,341us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	1,603	1,287	2,169
State	84	(263)	651
Foreign	(230)	(260)	(264)
Total deferred income taxes	1,457us-gaap_DeferredIncomeTaxExpenseBenefit	764us-gaap_DeferredIncomeTaxExpenseBenefit	2,556us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for income taxes	$ 17,986us-gaap_IncomeTaxExpenseBenefit	$ 11,050us-gaap_IncomeTaxExpenseBenefit	$ 10,897us-gaap_IncomeTaxExpenseBenefit

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

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