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Fair Values of Financial Instruments - Schedule of Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Jan. 19, 2018
Dec. 31, 2017
Dec. 22, 2017
Assets          
Cash and cash equivalents $ 149,904 $ 120,221   $ 176,274  
Liabilities          
Senior notes     $ 100,000   $ 300,000
Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit 0 0      
Senior Notes [Member]          
Liabilities          
Senior notes 400,000 400,000      
Reported Value Measurement [Member]          
Assets          
Cash and cash equivalents 149,904 120,221      
Restricted Cash 0 2,107      
Foreign exchange forward contracts 96 157      
Liabilities          
Senior notes 385,987 383,669      
Foreign exchange forwards, liability, at fair value 162 337      
Reported Value Measurement [Member] | Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit 0 0      
Reported Value Measurement [Member] | USD Denominated Term Loan [Member]          
Liabilities          
Term loans 546,495 632,954      
Estimate of Fair Value Measurement [Member]          
Assets          
Cash and cash equivalents, at fair value 149,904 120,221      
Restricted Cash 0 2,107      
Foreign exchange forward contracts 96 157      
Liabilities          
Senior notes 416,500 368,000      
Foreign exchange forwards, liability, at fair value 162 337      
Estimate of Fair Value Measurement [Member] | Line of Credit [Member]          
Liabilities          
Multicurrency revolving line of credit, Fair Value of Amount Outstanding 0 0      
Estimate of Fair Value Measurement [Member] | USD Denominated Term Loan [Member]          
Liabilities          
Term loans, at fair value 550,135 630,971      
Interest Rate Swap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 174 2,612      
Interest Rate Swap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Interest rate swap contracts 174 2,612      
Interest Rate Cap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 1 786      
Interest Rate Cap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Interest rate swap contracts 1 786      
Currency Swap [Member] | Reported Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent 4,026 2,970      
Currency Swap [Member] | Estimate of Fair Value Measurement [Member]          
Assets          
Derivative Asset, Noncurrent $ 4,026 $ 2,970