Income Taxes - Significant Components of Income Tax Provision/(Benefit) (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 508us-gaap_CurrentFederalTaxExpenseBenefit	$ 661us-gaap_CurrentFederalTaxExpenseBenefit	$ 39us-gaap_CurrentFederalTaxExpenseBenefit
State	437	671	534
Non-U.S.	6,981us-gaap_CurrentForeignTaxExpenseBenefit	4,804us-gaap_CurrentForeignTaxExpenseBenefit	5,839us-gaap_CurrentForeignTaxExpenseBenefit
Total Current	7,926us-gaap_CurrentIncomeTaxExpenseBenefit	6,136us-gaap_CurrentIncomeTaxExpenseBenefit	6,412us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	3,436	7,091	(1,423)
State	154	877	(350)
Non-U.S.	1,310	1,962	(3,687)
Total Deferred	4,900us-gaap_DeferredIncomeTaxExpenseBenefit	9,930us-gaap_DeferredIncomeTaxExpenseBenefit	(5,460)us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for Income Taxes	$ 12,826us-gaap_IncomeTaxExpenseBenefit	$ 16,066us-gaap_IncomeTaxExpenseBenefit	$ 952us-gaap_IncomeTaxExpenseBenefit

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