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Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Undistributed earnings of foreign subsidiaries $ 52,546      
Unrecognized tax benefit, excluding interest and penalties 12,028 11,553 9,410 5,723
Unrecognized tax benefits that would affect effective tax rate 10,139      
Amount included in Other long-term liabilities 8,607 7,032    
Amount of previously unrecognized tax benefits recognized 1,022      
Tax related interest and penalties 754 770 634  
Current liabilities [Member]
        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Amount netted against current payable account 4,175      
Other long-term liabilities [Member]
        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Amount included in Other long-term liabilities 8,607      
Settlement and Lapse of Statute [Member]
        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Unrecognized tax benefits within the next 12 months $ 1,067