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Combined Guarantor Subsidiaries - Leases - Future Minimum Lease Payments to be Received (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Condensed Financial Statements Captions [Line Items]    
2020 $ 502,532,000  
2021 446,438,000  
2022 370,872,000  
2023 307,297,000  
2024 245,824,000  
Thereafter 628,945,000  
Total undiscounted lease payments 2,501,908,000  
2019   $ 497,014,000
2020   426,228,000
2021   363,482,000
2022   294,441,000
2023   234,191,000
Thereafter   531,792,000
Total   2,347,148,000
Guarantor Subsidiaries    
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