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Financial Instruments and Fair Value Measurements - Schedule of Fair Value Measurement Information about Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Term loan $ 772,000 $ 992,000
Senior notes due 2026 375,000  
Finance lease liabilities 7,086 7,127
Notes payable 231 1,111
Long-term Debt 1,125,314 971,043
Carrying Amount [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,154,317 1,000,238
Carrying Amount [Member] | Level 2 [Member]    
Debt Instrument [Line Items]    
Term loan 772,000 992,000
Senior notes due 2026 375,000  
Carrying Amount [Member] | Level 3 [Member]    
Debt Instrument [Line Items]    
Finance lease liabilities 7,086 7,127
Notes payable 231 1,111
Fair Value [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,160,825 960,538
Fair Value [Member] | Level 2 [Member]    
Debt Instrument [Line Items]    
Term loan 770,070 952,300
Senior notes due 2026 383,438  
Fair Value [Member] | Level 3 [Member]    
Debt Instrument [Line Items]    
Finance lease liabilities 7,086 7,127
Notes payable $ 231 $ 1,111