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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Line Items]    
Net deferred tax asset $ 65,420 $ 87,432
Current deferred tax assets 12,051 17,188
Non-current deferred tax assets 63,321 75,319
Current deferred tax liabilities 1,728 895
Non-current deferred tax liabilities 8,224 4,180
Temporary differences related to investments in foreign subsidiaries 143,388  
Gross unrecognized tax benefits 63 221
Current Assets [Member]    
Income Taxes [Line Items]    
Current deferred tax assets 12,051 17,188
Non-current Assets [Member]    
Income Taxes [Line Items]    
Non-current deferred tax assets 63,321 75,319
Current Liabilities [Member]    
Income Taxes [Line Items]    
Current deferred tax liabilities 1,728 895
Non-current Liabilities [Member]    
Income Taxes [Line Items]    
Non-current deferred tax liabilities $ 8,224 $ 4,180