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Long-Term Debt - Narrative (Details)
1 Months Ended 9 Months Ended
Aug. 01, 2018
USD ($)
extension
Sep. 30, 2023
Aug. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]            
Debt issuance costs incurred $ 27,133,000     $ 0 $ 27,191,000  
Restricted cash       30,499,000   $ 30,708,000
Loss on extinguishment of debt     $ 4,570,000 $ 0 $ 4,570,000  
Interest rate caps | Cash Flow Hedging            
Debt Instrument [Line Items]            
Derivative liability, notional amount 219,837,000          
Variable funding notes | Revolving Financing Facility            
Debt Instrument [Line Items]            
Debt face amount $ 75,000,000          
Commitment fee percentage 0.50%          
Number of additional extensions | extension 2          
Term of extension 1 year          
Variable funding notes | Revolving Financing Facility | Scenario, Forecast            
Debt Instrument [Line Items]            
Line of credit interest rate   5.00%        
Class A-2-I notes | Senior fixed-rate term notes            
Debt Instrument [Line Items]            
Fixed interest rate 4.262%          
Debt face amount $ 575,000,000          
Class A-2-II notes | Senior fixed-rate term notes            
Debt Instrument [Line Items]            
Fixed interest rate 4.666%          
Debt face amount $ 625,000,000