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Summary of Significant Accounting Policies - Merger (Details) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended | 15 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Purchase consideration |  |  |  |  |  |
Cash consideration paid by the Company to iStar |  |  |  | $ 88,685 |  |
Impairment of goodwill |  | $ 145,365 |  | 145,365 |  |
Purchase price allocation |  |  |  |  |  |
Deferred tax asset, net |  | 7,173 |  | 7,173 | $ 7,173 |
Operating lease, right-of-use asset |  | $ 34,981 |  | $ 34,981 | $ 34,981 | $ 26,312
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |  | Deferred Costs and Other Assets |  | Deferred Costs and Other Assets | Deferred Costs and Other Assets | Deferred Costs and Other Assets
Office furniture and equipment |  | $ 1,078 |  | $ 1,078 | $ 1,078 |
Operating lease liability |  | $ 17,047 |  | $ 17,047 | $ 17,047 | $ 5,471
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] |  | Accounts payable, accrued expenses and other liabilities |  | Accounts payable, accrued expenses and other liabilities | Accounts payable, accrued expenses and other liabilities | Accounts payable, accrued expenses and other liabilities
Secured term loan facility |  |  |  |  |  |
Purchase consideration |  |  |  |  |  |
Provision for credit losses |  |  |  | $ 2,300 |  |
iStar Merger |  |  |  |  |  |
Purchase consideration |  |  |  |  |  |
Total Company shares as purchase price | shares | 1,195,034 |  |  |  |  |
Stock price of the Company's common stock | $ / shares | $ 29.78 |  |  |  |  |
Fair value of the Company's stock transferred | $ 35,588 |  |  |  |  |
Cash consideration paid by the Company to iStar | 88,685 |  |  |  |  |
Purchase consideration | $ 124,273 |  |  |  |  |
Shares issued as settled for iStar preexisting investment in the Company which are excluded from purchase consideration | shares | 12,700,000 |  |  |  |  |
Merger expenses |  |  |  | 18,900 | $ 26,600 |
Merger related nonrecurring charges |  |  |  | 3,000 |  |
Impairment of goodwill |  |  |  | 145,365 |  |
Purchase price allocation |  |  |  |  |  |
Cash and cash equivalents | $ 3,213 |  |  |  |  |
Real estate | 1,508 |  |  |  |  |
Equity investments | 61,247 |  |  |  |  |
Deferred tax asset, net | 6,292 |  | $ 6,300 |  |  |
Deferred expenses and other assets | 31,922 |  |  |  |  |
Total assets acquired | 104,182 |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | (25,279) |  |  |  |  |
Debt obligations, net | (99,995) |  |  |  |  |
Total liabilities assumed | (125,274) |  |  |  |  |
Net identifiable liabilities acquired | (21,092) |  |  |  |  |
Goodwill | 145,365 |  |  |  |  |
Operating lease, right-of-use asset | $ 11,000 |  |  |  |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Deferred Costs and Other Assets |  |  |  |  |
Prepaid expenses | $ 4,700 |  |  |  |  |
Operating lease liability | $ 14,200 |  |  |  |  |
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Accounts payable, accrued expenses and other liabilities |  |  |  |  |
Obligations assumed which are directly offset by corresponding equivalent cash and receivable assets acquired sufficient to settle such obligations. | $ 8,700 |  |  |  |  |
Deferred tax assets valuation allowance |  |  | 2,800 |  |  |
Reduction in goodwill |  |  | $ 6,300 |  |  |
iStar Merger | Fair Value, Inputs, Level 3 |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Equity Securities, FV-NI, Measurement Input [Extensible Enumeration] | Measurement Input, Discount Rate |  |  |  |  |
Debt Instrument, Measurement Input | 6.7 |  |  |  |  |
Debt Instrument, Measurement Input [Extensible Enumeration] | Measurement Input, Discount Rate |  |  |  |  |
iStar Merger | Fair Value, Inputs, Level 3 | Measurement Input, Discount Rate | Minimum |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Equity Securities, FV-NI, Measurement Input | 0.072 |  |  |  |  |
iStar Merger | Fair Value, Inputs, Level 3 | Measurement Input, Discount Rate | Maximum |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Equity Securities, FV-NI, Measurement Input | 0.139 |  |  |  |  |
iStar Merger | Deferred expenses and other assets |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
In-place prepaid contracts | $ 2,100 |  |  |  |  |
Office furniture and equipment | 1,300 |  |  |  |  |
Other receivables | 6,300 |  |  |  |  |
iStar Merger | Other expense |  |  |  |  |  |
Purchase consideration |  |  |  |  |  |
Merger expenses |  | $ 100 |  | 14,100 |  |
Merger related nonrecurring charges |  |  |  | 900 |  |
iStar Merger | General and Administrative Expense |  |  |  |  |  |
Purchase consideration |  |  |  |  |  |
Merger expenses |  |  |  | 4,800 |  |
iStar Merger | Preliminary Purchase Price Allocation |  |  |  |  |  |
Purchase consideration |  |  |  |  |  |
Purchase consideration | 124,273 |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Cash and cash equivalents | 3,213 |  |  |  |  |
Real estate | 1,508 |  |  |  |  |
Equity investments | 61,247 |  |  |  |  |
Deferred expenses and other assets | 25,442 |  |  |  |  |
Total assets acquired | 91,410 |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | (22,939) |  |  |  |  |
Debt obligations, net | (99,995) |  |  |  |  |
Total liabilities assumed | (122,934) |  |  |  |  |
Net identifiable liabilities acquired | (31,524) |  |  |  |  |
Goodwill | 155,797 |  |  |  |  |
iStar Merger | Measurement Period Adjustment |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |
Deferred tax asset, net | 6,292 |  |  |  |  |
Deferred expenses and other assets | 6,480 | 6,500 |  | 6,500 | 6,500 |
Total assets acquired | 12,772 |  |  |  |  |
Accounts payable, accrued expenses and other liabilities | (2,340) | $ (2,300) |  | $ (2,300) | $ (2,300) |
Total liabilities assumed | (2,340) |  |  |  |  |
Net identifiable liabilities acquired | 10,432 |  |  |  |  |
Goodwill | $ (10,432) |  |  |  |  |

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