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Fair Values of Financial Instruments - Schedule of Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jan. 19, 2018
Dec. 31, 2017
Dec. 22, 2017
Dec. 31, 2016
Assets          
Cash and cash equivalents $ 120,221   $ 176,274   $ 133,565
Liabilities          
Senior notes   $ 100,000   $ 300,000  
Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit 0   125,414    
Senior Notes [Member]          
Liabilities          
Senior notes 400,000   300,000    
Reported Value Measurement [Member]          
Assets          
Cash and cash equivalents 120,221   176,274    
Restricted Cash 2,107   311,061    
Foreign exchange forward contracts 157   41    
Liabilities          
Senior notes     300,000    
Foreign exchange forwards, liability, at fair value 337   289    
Reported Value Measurement [Member] | Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit 0   125,414    
Reported Value Measurement [Member] | USD Denominated Term Loan [Member]          
Liabilities          
Term loans 637,813   194,063    
Estimate of Fair Value Measurement [Member]          
Assets          
Cash and cash equivalents, at fair value 120,221   176,274    
Restricted Cash 2,107   311,061    
Foreign exchange forward contracts 157   41    
Liabilities          
Senior notes 368,000   301,125    
Foreign exchange forwards, liability, at fair value 337   289    
Estimate of Fair Value Measurement [Member] | Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit, Fair Value of Amount Outstanding 0   124,100    
Estimate of Fair Value Measurement [Member] | USD Denominated Term Loan [Member]          
Liabilities          
Term loans, at fair value 630,971   192,295    
Interest Rate Swap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 2,612   2,370    
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Interest rate swap contracts 2,612   2,370    
Interest Rate Cap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 786   489    
Interest Rate Cap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Interest rate swap contracts 786   489    
Currency Swap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 2,970   0    
Currency Swap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent $ 2,970   $ 0