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SALE OF COMMERCIAL REAL ESTATE BUSINESS - Carrying Value of Assets and Liabilities of CRE Business (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | [1]
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Disposal Group, Including Discontinued Operations, Assets [Abstract] |  |
Total assets of disposal group held for sale | $ 238,042 | $ 0
Disposal Group, Including Discontinued Operation, Liabilities [Abstract] |  |
Total liabilities of disposal group held for sale | 159,508 | $ 0
CRE Business | Discontinued Operations, Disposed of by Sale |  |
Disposal Group, Including Discontinued Operations, Assets [Abstract] |  |
Cash and cash equivalents | 2,772 |
Securities | 8,016 |
Assets transferred or pledged to securitization vehicles | 52,684 |
Real estate, net | 142,381 |
Intangible assets, net | 6,573 |
Other assets | 25,616 |
Total assets of disposal group held for sale | 238,042 |
Disposal Group, Including Discontinued Operation, Liabilities [Abstract] |  |
Mortgages payable | 113,362 |
Interest payable | 347 |
Other liabilities | 45,799 |
Total liabilities of disposal group held for sale | $ 159,508 |
[1] | (1)Derived from the audited consolidated financial statements at December 31, 2020.

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