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Schedule of Debt (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Jan. 19, 2018
Dec. 31, 2017
Dec. 22, 2017
Debt Instrument [Line Items]        
Senior Notes   $ 100,000   $ 300,000
Total debt $ 745,777      
Current portion of debt 16,250   $ 19,688  
Long-term debt 1,105,538   593,572  
2018 (amount remaining at March 31, 2018) 12,188      
2019 28,438      
2020 44,777      
2021 60,937      
2022 65,000      
2023 534,437      
Secured Debt [Member]        
Debt Instrument [Line Items]        
Total debt 1,145,777   619,477  
Current portion of debt 16,250   19,688  
Long-term debt 1,105,538   593,572  
USD Denominated Term Loan [Member]        
Debt Instrument [Line Items]        
USD denominated term loan 650,000   194,063  
Deferred Finance Costs, Noncurrent, Net 5,912   629  
Line of Credit [Member]        
Debt Instrument [Line Items]        
Multicurrency revolving line of credit 95,777   125,414  
Senior Notes [Member]        
Debt Instrument [Line Items]        
Senior Notes 400,000   300,000  
Deferred Finance Costs, Noncurrent, Net $ 18,077   $ 5,588  
EURIBOR [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Effective Percentage 2.00%      
Debt Instrument, Basis Spread on Variable Rate 2.00%