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Combined Guarantor Subsidiaries - Leases - Future Minimum Lease Payments to be Received (Details) - Guarantor Subsidiaries - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Condensed Financial Statements Captions [Line Items]    
2020 $ 194,258,000  
2021 174,409,000  
2022 144,230,000  
2023 121,773,000  
2024 95,661,000  
Thereafter 234,711,000  
Total undiscounted lease payments $ 965,042,000  
2019   $ 184,923,000
2020   154,944,000
2021   133,093,000
2022   107,092,000
2023   86,957,000
Thereafter   193,324,000
Total   $ 860,333,000