Income Taxes - Valuation Allowance Rollforward (Details) (Valuation Allowance of Deferred Tax Assets [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances, Beginning Balance	$ 1,377	$ 4,923	$ 5,666
Additional Valuation Allowance	6,594	348	38
Allowance Utilization and Other	(34)	(3,753)	(769)
Effect of Exchange Rate Changes	(79)	(141)	(12)
Valuation Allowance, Ending Balance	$ 7,858	$ 1,377	$ 4,923