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Financial Instruments and Fair Value Measurements - Schedule of Fair Value Measurement Information about Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Term loans $ 772,000 $ 992,000
Senior notes due 2026 375,000  
Finance lease liabilities 11,569 7,127
Notes payable 4,748 1,111
Long-term Debt 1,135,248 971,043
Carrying Amount [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,163,317 1,000,238
Carrying Amount [Member] | Level 2 [Member]    
Debt Instrument [Line Items]    
Term loans 772,000 992,000
Senior notes due 2026 375,000  
Carrying Amount [Member] | Level 3 [Member]    
Debt Instrument [Line Items]    
Finance lease liabilities 11,569 7,127
Notes payable 4,748 1,111
Fair Value [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,182,613 960,538
Fair Value [Member] | Level 2 [Member]    
Debt Instrument [Line Items]    
Term loans 775,358 952,300
Senior notes due 2026 390,938  
Fair Value [Member] | Level 3 [Member]    
Debt Instrument [Line Items]    
Finance lease liabilities 11,569 7,127
Notes payable $ 4,748 $ 1,111