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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Undistributed earnings of foreign subsidiaries $ 84,620      
Unrecognized tax benefit, excluding interest and penalties 14,517 $ 14,018 $ 12,028 $ 11,553
Unrecognized tax benefits that would affect effective tax rate 12,898      
Amount included in Other long-term liabilities 11,397 10,327    
Amount of previously unrecognized tax benefits recognized 1,752      
Tax related interest and penalties 1,391 $ 1,066 $ 754  
Current liabilities [Member]        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Amount netted against current payable account 4,512      
Other long-term liabilities [Member]        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Amount included in Other long-term liabilities 11,397      
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 $ 4,512