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Chapter 11 Cases and Ability to Continue as a Going Concern - Narrative (Details) - USD ($) |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 02, 2020 | Aug. 18, 2020 | Sep. 30, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Secured credit facility |  |  | $ 3,162,278,000 | $ 3,162,278,000 |
Common stock issued (shares) |  |  | 197,630,693 | 197,630,693 | 196,569,917
Common stock outstanding (shares) |  |  | 197,630,693 | 197,630,693 | 196,569,917
Common stock, par value (USD per share) |  |  | $ 0.01 | $ 0.01 | $ 0.01
Short term property-level debt and related obligations | $ 1,315,000,000 |  |  |  |
Fresh-start reporting, description |  |  |  | In order to qualify for fresh-start reporting (i) the holders of existing voting shares of the Company prior to its emergence must receive less than 50% of the voting shares of the Company outstanding following its emergence from bankruptcy and (ii) the reorganization value of the Company’s assets immediately prior to confirmation of the Plan must be less than the post-petition liabilities and allowed claims. Under the principles of fresh-start reporting, a new reporting entity (the “Successor”) will be considered to have been created, and, as a result, the Successor will allocate the reorganization value of the Successor to its individual assets based on their estimated fair values. The process of estimating the fair value of the Successor’s assets, liabilities and equity upon emergence is currently ongoing and, therefore, such amounts have not yet been finalized. |
Maximum percentage of voting shares to qualify for fresh-start reporting |  |  |  | 50.00% |
Reorganization items |  |  | $ 12,008,000 | $ 52,014,000 |
Professional fees |  |  | 11,051,000 | 48,760,000 |
Compensation associated with reorganization efforts |  |  | 441,000 | 1,513,000 |
U.S. Trustee fees |  |  | 516,000 | 1,741,000 |
Liabilities subject to compromise |  |  | 2,551,686,000 | 2,551,686,000 | $ 2,551,490,000
Interest expense |  |  | 45,344,000 | $ 135,162,000 |
Series D Preferred Stock |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Dividend rate of preferred stock (as a percent) | 7.375% |  |  | 7.375% | 7.375%
Series E Preferred Stock |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Dividend rate of preferred stock (as a percent) | 6.625% |  |  | 6.625% | 6.625%
Senior Unsecured Notes |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Liabilities subject to compromise |  |  | 1,375,000,000 | $ 1,375,000,000 | $ 1,375,000,000
Secured Line of Credit |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Liabilities subject to compromise |  |  | 675,926,000 | 675,926,000 | 675,926,000
Secured Term Loan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Liabilities subject to compromise |  |  | 438,750,000 | 438,750,000 | 438,750,000
Unpaid Accrued Interest |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Liabilities subject to compromise |  |  | 57,644,000 | 57,644,000 | 57,644,000
Prepetition Unsecured Or Under Secured Liabilities |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Liabilities subject to compromise |  |  | 4,366,000 | 4,366,000 | $ 4,170,000
Restructuring Support Agreement |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Principal amount of unsecured notes |  |  | 1,375,000,000 | 1,375,000,000 |
New senior secured notes |  |  | 455,000,000 | 455,000,000 |
Cash |  |  | 95,000,000 | 95,000,000 |
Convertible secured notes |  |  | $ 100,000,000 | $ 100,000,000 |
Percentage of issuance of new common equity to holders of unsecured notes |  |  |  | 89.00% |
Common stock issued (shares) |  |  | 20,000,000 | 20,000,000 |
Common stock outstanding (shares) |  |  | 20,000,000 | 20,000,000 |
Common stock, par value (USD per share) |  |  | $ 0.01 | $ 0.01 |
Restructuring Support Agreement | Management Incentive Plan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Common stock reserved |  |  | 3,222,222 | 3,222,222 |
Restructuring Support Agreement | Secured Credit Facility |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Secured credit facility |  |  | $ 133,000,000 | $ 133,000,000 |
Restructuring Support Agreement | Subscription Option |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Cash |  |  | 100,000,000 | 100,000,000 |
Convertible secured notes |  |  | 50,000,000 | $ 50,000,000 |
Percentage of issuance of new common equity to holders of unsecured notes |  |  |  | 5.50% |
Restructuring Support Agreement | Subscription Option | Secured Credit Facility |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Secured credit facility |  |  | 983,700,000 | $ 983,700,000 |
Restructuring Support Agreement | Subscription Option | Secured Term Loan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Secured credit facility |  |  | $ 883,700,000 | $ 883,700,000 |
Restructuring Support Agreement | Exchangeable Notes Indenture |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Common stock reserved |  |  | 9,000,000 | 9,000,000 |
Restructuring Support Agreement | Senior Unsecured Notes | 2023 Notes |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Aggregate principal amount of senior unsecured notes |  | $ 450,000,000 |  |  |
Interest rate percentage |  | 5.25% |  |  |
Debt instrument, maturity date |  | Dec. 01, 2023 |  |  |
Restructuring Support Agreement | Senior Unsecured Notes | 2024 Notes |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Aggregate principal amount of senior unsecured notes |  | $ 300,000,000 |  |  |
Interest rate percentage |  | 4.60% |  |  |
Debt instrument, maturity date |  | Oct. 15, 2024 |  |  |
Restructuring Support Agreement | Senior Unsecured Notes | 2026 Notes |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Aggregate principal amount of senior unsecured notes |  | $ 625,000,000 |  |  |
Interest rate percentage |  | 5.95% |  |  |
Debt instrument, maturity date |  | Dec. 15, 2026 |  |  |
Exit Credit Agreement | Senior Secured Term Loan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Debt instrument, maturity date |  |  |  | Nov. 01, 2025 |
Secured credit facility |  |  | $ 883,700,000 | $ 883,700,000 |
Debt instrument, maturity date, description |  |  |  | senior secured term loan that matures November 1, 2025. Upon satisfaction of certain conditions, the maturity date will automatically extend to November 1, 2026 and upon further satisfaction of certain conditions the maturity date will automatically extend to November 1, 2027. |
Debt Instrument, covenant description |  |  |  | The Exit Credit Agreement requires HoldCo I to comply with certain financial ratios in the aggregate for the collateral properties, including a covenant that it not permit the (i) interest coverage ratio (as defined in the Exit Credit Agreement) commencing with the fiscal quarter ending December 31, 2021, to be less than 1.50 to 1.00, (ii) minimum debt yield ratio (as defined in the Exit Credit Agreement) commencing with the fiscal quarter ending March 31, 2023 as of the last day of any fiscal quarter ending prior to the maturity date, to be less than eleven and a half percent (11.50%) and (iii) the occupancy rate (as defined in the Exit Credit Agreement) commencing with the fiscal quarter ending March 31, 2023, as of the last day of any fiscal quarter ending prior to the maturity date, to be less than seventy five percent (75%). |
Maximum debt yield ratio |  |  |  | 11.50% |
Exit Credit Agreement | Senior Secured Term Loan | LIBOR |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Interest rate percentage |  |  | 1.00% | 1.00% |
Debt instrument basis points |  |  |  | 2.75% |
Debt instrument, description of variable rate basis |  |  |  | Borrowings that are LIBOR loans bear interest at a rate per annum equal to LIBOR (as defined in the Exit Credit Agreement) for the applicable interest period plus 275 basis points, subject to a LIBOR floor of 1.0%. |
Exit Credit Agreement | Senior Secured Term Loan | Base Rate |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Debt instrument basis points |  |  |  | 1.75% |
Debt instrument, description of variable rate basis |  |  |  | Borrowings that are base rate Loans bear interest at a rate per annum equal to the base rate (as defined in the Exit Credit Agreement) plus 175 basis points. |
Secured Notes Indenture | 10% Senior Secured Notes Due 2029 |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Interest rate percentage |  |  | 10.00% | 10.00% |
Debt instrument, maturity date |  |  |  | Nov. 15, 2029 |
Secured credit facility |  |  | $ 455,000,000 | $ 455,000,000 |
Debt Instrument, payment terms description |  |  |  | payable semi-annually on November 15 and May 15, beginning May 15, 2022 |
Debt instrument, frequency of periodic payment |  |  |  | semi-annually |
Debt instrument, date of first required payment |  |  |  | May 15, 2022 |
Debt instrument, redemption description |  |  |  | HoldCo II redeemed $60,000 aggregate principal amount of the Secured Notes pursuant to an optional redemption on November 8, 2021 |
Redemption of aggregate principal amount |  |  |  | $ 60,000,000 |
Debt instrument, outstanding balance after redemption |  |  | 395,000,000 | 395,000,000 |
Exchangeable Notes Indenture |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Aggregate principal amount of senior unsecured notes |  |  | $ 0 | $ 0 |
Exchangeable Notes Indenture | 7.0% Exchangeable Senior Secured Notes Due 2028 |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Interest rate percentage |  |  | 7.00% | 7.00% |
Debt instrument, maturity date |  |  |  | Nov. 15, 2028 |
Secured credit facility |  |  | $ 150,000,000 | $ 150,000,000 |
Debt Instrument, payment terms description |  |  |  | payable semi-annually on November 15 and May 15, beginning May 15, 2022 |
Debt instrument, frequency of periodic payment |  |  |  | semi-annually |
Debt instrument, date of first required payment |  |  |  | May 15, 2022 |
2021 Equity Incentive Plan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Number for common stock available for grant |  |  | 3,222,222 | 3,222,222 |
Percentage of annual increase of number of shares |  |  | 3.00% | 3.00% |
Minimum |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Percentage of projected annual operating cash flows | 25.00% |  |  |  |
Minimum | Restructuring Support Agreement |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Aggregate principal amount of operating partnership |  | 62.00% |  |  |
Minimum | Exchangeable Notes Indenture |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Common stock weighted average price percentage |  |  |  | 160.00% |
Effect of exchangeable notes price period |  |  |  | 20 days |
Percentage of modified cash NOI on trailing period basis |  |  |  | 15.00% |
Maximum |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Percentage of projected annual operating cash flows | 35.00% |  |  |  |
Maximum | Exit Credit Agreement | Senior Secured Term Loan |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Interest coverage ratio |  |  |  | 1.50% |
Occupancy rate |  |  |  | 75.00% |
Maximum | Exchangeable Notes Indenture |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |
Effect of exchangeable notes price period |  |  |  | 30 days |
Debt instrument, period |  |  |  | 36 months |

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