Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Undistributed earnings of foreign subsidiaries	$ 47,385
Unrecognized tax benefit, excluding interest and penalties	11,553	9,410	5,723	4,989
Unrecognized tax benefits that would affect effective tax rate	9,965
Amount included in Current liabilities	5,291
Amount included in Other long-term liabilities	7,032	8,276
Amount of previously unrecognized tax benefits recognized	1,944
Tax related interest and penalties	770	634	690
Unrecognized tax benefits within the next 12 months	$ 5,291