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Accumulated Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income (Loss) (Details)) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance $ (136,057) $ (79,248)  
Foreign currency translation adjustment (45,426) (55,852) $ (74,758)
Other Comprehensive Income (Loss), before Reclassifications, before Tax (45,991) (55,214)  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax 587 2,727  
Net current-period other comprehensive (loss) income, before income taxes (45,404) (52,487) (70,438)
Income tax expense (12,337) (4,322) (4,315)
Net current-period other comprehensive (loss) income, net of income taxes (57,741) (56,809) (74,753)
Ending Balance (193,798) (136,057) (79,248)
Cash Flow Hedging [Member] | Interest Expense [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [1] (587) (2,727)  
Cash Flow Hedging [Member] | Interest Rate Swap [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Amounts reclassified from accumulated other comprehensive loss (565) 638  
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance (136,434) (77,492)  
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax 0 0  
Net current-period other comprehensive (loss) income, before income taxes (45,426) (55,852)  
Income tax expense (12,329) (3,090)  
Net current-period other comprehensive (loss) income, net of income taxes (57,755) (58,942)  
Ending Balance (194,189) (136,434) (77,492)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance 377 (1,756)  
Net current-period other comprehensive (loss) income, before income taxes 22 3,365  
Income tax expense (8) (1,232)  
Net current-period other comprehensive (loss) income, net of income taxes 14 2,133  
Ending Balance $ 391 $ 377 $ (1,756)
[1] There were no gains or losses recognized in earnings related to any ineffective portion of the hedging relationship or related to any amount excluded from the assessment of hedge effectiveness for the years ended December 31, 2016 and 2015.