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Long-Term Debt - Maturity Profile of Term Loan Outstanding Net of Debt Amortization Expense (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Total $ 1,365,206 $ 1,373,305
Term Loan Credit Facility    
Debt Instrument [Line Items]    
2020 25,133  
2021 33,537  
2022 33,564  
2023 526,750  
Total $ 618,984 $ 627,359