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Debt (Details)
1 Months Ended 3 Months Ended
Mar. 31, 2018
USD ($)
asset
Mar. 31, 2018
USD ($)
asset
Mar. 31, 2017
USD ($)
Mar. 09, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt          
Number of Assets Encumbered | asset 15 15      
Long-term debt, gross $ 744,423,000 $ 744,423,000      
Deferred financing costs (169,000) (169,000)      
Debt, net $ 744,254,000 744,254,000     $ 1,300,000,000
Interest Expense   $ 13,100,000      
Predecessor          
Debt          
Long-term debt, gross         1,299,336,000
Deferred financing costs         (231,000)
Debt, net         1,299,105,000
Interest Expense     $ 19,319,000    
Interest Costs Capitalized     $ 400,000    
Senior Secured Notes [Member]          
Debt          
Debt Instrument, Redemption Price, Percentage 102.813%        
Early Repayment of Senior Secured Notes       $ 12,900,000  
Debt Instrument, Repurchase Amount       $ 539,000,000  
Senior Unsecured Notes [Member]          
Debt          
Debt Instrument, Redemption Price, Percentage   103.00%      
Unsecured Debt | 6.00% Percent, Due June 2025          
Debt          
Number of Assets Encumbered | asset 0 0      
Interest rate 6.00% 6.00%      
Long-term debt, gross $ 508,866,000 $ 508,866,000      
Unsecured Debt | 6.00% Percent, Due June 2025 | Predecessor          
Debt          
Long-term debt, gross         510,047,000
Secured Debt | 5.63 Percent, Due March 2023          
Debt          
Number of Assets Encumbered | asset 9 9      
Interest rate 5.625% 5.625%      
Long-term debt, gross $ 0 $ 0      
Secured Debt | 5.63 Percent, Due March 2023 | Predecessor          
Debt          
Long-term debt, gross         552,669,000
Mortgage loans | LIBOR Plus Three Point Zero Zero Percent Due November 2018 [Member]          
Debt          
Number of Assets Encumbered | asset 1 1      
Long-term debt, gross $ 85,294,000 $ 85,294,000      
Mortgage loans | LIBOR Plus Three Point Zero Zero Percent Due November 2018 [Member] | Predecessor          
Debt          
Long-term debt, gross         85,404,000
Mortgage loans | LIBOR Plus Three Point Zero Zero Percent Due November 2018 [Member] | LIBOR          
Debt          
Basis spread   3.00%      
Mortgage loans | 4.95 Percent, Due October 2022          
Debt          
Number of Assets Encumbered | asset 4 4      
Interest rate 4.95% 4.95%      
Long-term debt, gross $ 120,131,000 $ 120,131,000      
Mortgage loans | 4.95 Percent, Due October 2022 | Predecessor          
Debt          
Long-term debt, gross         120,893,000
Mortgage loans | 4.94 Percent, Due October 2022          
Debt          
Number of Assets Encumbered | asset 1 1      
Interest rate 4.94% 4.94%      
Long-term debt, gross $ 30,132,000 $ 30,132,000      
Mortgage loans | 4.94 Percent, Due October 2022 | Predecessor          
Debt          
Long-term debt, gross         30,323,000
Senior Unsecured Notes [Member] | Unsecured Debt          
Debt          
Debt Instrument, Fair Value Adjustment, Net 33,866,074 33,866,074     35,100,000.0
Senior Secured Notes [Member] | Secured Debt          
Debt          
Debt Instrument, Fair Value Adjustment, Net         28,700,000.0
LIBOR Plus Three Point Zero Zero Percent Due November 2018 [Member] | Secured Debt          
Debt          
Debt Instrument, Fair Value Adjustment, Net 300,000 300,000     400,000
4.94 Percent, Due October 2022 | Secured Debt          
Debt          
Debt Instrument, Fair Value Adjustment, Net 700,000 700,000     700,000
4.95 Percent, Due October 2022 | Secured Debt          
Debt          
Debt Instrument, Fair Value Adjustment, Net $ 2,900,000 $ 2,900,000     $ 3,000,000