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Fair Value Disclosures - Summary of Assets and Liabilities Related to Financial Instruments, Measured at Fair Value on a Recurring Basis (Detail) - Level 2 - Recurring - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Term loan | Book Value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets and liabilities related to financial instruments $ 250,000 $ 0
Term loan | Fair Value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets and liabilities related to financial instruments 250,000 0
Senior Notes | Book Value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets and liabilities related to financial instruments 1,045,072 1,425,397
Senior Notes | Fair Value    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Assets and liabilities related to financial instruments $ 1,104,750 $ 1,308,826