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Derivatives Instruments - Effect of Derivative Instruments on Statement of Financial Position (Details) - USD ($)
5 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 02, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivative [Line Items]          
Interest expense   $ 20,200,000 $ 27,300,000 $ 30,900,000 $ 30,700,000
Interest Rate Swap          
Derivative [Line Items]          
Derivatives not designated as hedging instruments gain (loss)     (6,500,000)    
Interest Expense | Interest Rate Swap          
Derivative [Line Items]          
Derivatives designated as hedging instruments gain (loss) $ 0   (100,000)    
Derivatives not designated as hedging instruments gain (loss)   $ 0 $ (6,600,000)