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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards [Line Items]      
Federal statutory percentage rate 35.00% 35.00% 35.00%
Undistributed earnings of foreign subsidiaries $ 173,844    
Additional unrecognized tax benefit that would affect our annual effective tax rate $ 235 $ 301  
Federal      
Operating Loss Carryforwards [Line Items]      
Federal statutory percentage rate 35.00%    
Foreign      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards with unlimited carryforward period $ 10,200    
Net operating loss carryforwards expiring in 2035 900    
State      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 2,600