Income Taxes - Valuation Allowance Rollforward (Details) (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances, Beginning Balance	$ 7,666	$ 7,858	$ 1,377
Additional Valuation Allowance	5	26	6,594
Allowance Utilization and Other	(105)	(1)	(34)
Effect of Exchange Rate Changes	(221)	(217)	(79)
Valuation Allowance, Ending Balance	$ 7,345	$ 7,666	$ 7,858