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Combined Guarantor Subsidiaries - Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets $ 199,740,000 $ 91,841,000 $ 81,350,000
Loss on impairment of real estate 239,521,000 174,529,000 71,401,000
Guarantor Subsidiaries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets 95,300,000   67,300,000
Loss on impairment of real estate 60,170,000 0 43,007,000
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets 0 0  
Significant Other Observable Inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets 0 0  
Significant Unobservable Inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets 199,740,000 $ 91,841,000  
Significant Unobservable Inputs (Level 3) | Guarantor Subsidiaries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Long-lived assets $ 95,300,000   $ 67,300,000