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v3.20.2

Basis of Presentation - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2019 USD ($) | Mar. 31, 2019 | Sep. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2018 partnership | Dec. 31, 2019 USD ($) | Mar. 01, 2019 USD ($) | May 31, 2018
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidation of multifamily loans held in securitization trusts |  |  |  |  |  | $ (3,849,779,000) | $ 1,481,554,000 |  |  |  |
Consolidation of multifamily ABS |  |  |  |  |  | $ (3,706,789,000) | 1,408,002,000 |  |  |  |
Deconsolidation, realized market valuation gain (loss) |  |  |  | $ (72,000,000) |  |  |  |  |  |  |
Number of partnerships consolidated | partnership |  |  |  |  |  |  |  | 2 |  |  |
VIE, ownership interest rate |  |  |  |  |  | 80.00% |  |  |  |  |
Goodwill impairment expense |  |  | $ 0 | 89,000,000 | $ 0 | $ 88,675,000 | 0 |  |  |  |
Intangible assets impairment expense |  |  |  | 0 |  |  |  |  |  |  |
Contingent consideration |  |  | 0 |  |  | 0 |  |  | $ 28,484,000 |  |
Acquisition related costs |  |  | 135,000 |  | $ 236,000 | 581,000 | $ 547,000 |  |  |  |
Multifamily loans |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidation of multifamily loans held in securitization trusts |  |  |  | 3,860,000,000 |  |  |  |  |  |  |
Consolidation of multifamily ABS |  |  |  | 3,720,000,000 |  |  |  |  |  |  |
5 Arches |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minority interest, percentage |  |  |  |  |  |  |  |  |  |  | 20.00%
Percent acquired |  | 80.00% |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  |  | $ 25,000,000 |
Contingent consideration |  |  | $ 14,000,000 |  |  | $ 14,000,000 |  |  |  | $ 25,000,000 |
Cash payment for contingent consideration liability |  |  |  | 11,000,000 |  |  |  |  |  |  |
Restricted stock awards |  |  |  | $ 3,000,000 |  |  |  |  |  |  |
CoreVest |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |
Intangible assets | $ 57,000,000 |  |  |  |  |  |  |  |  |  |
Restricted stock awards | $ 10,000,000 |  |  |  |  |  |  |  |  |  |
5 Arches LLC and CoreVest |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | 89,000,000 |  |
Goodwill deductible for tax purposes |  |  |  |  |  |  |  |  | $ 75,000,000 |  |

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- Definition Consolidation (Deconsolidation) Of Multifamily Loans Held In Securitizations Trusts + References No definition available. + Details
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