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SALE OF COMMERCIAL REAL ESTATE BUSINESS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Mar. 25, 2021 | Dec. 31, 2020 | [1]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Assets of disposal group held for sale | $ 238,042 |  | $ 238,042 |  |  | $ 0
Discontinued Operations, Held-for-sale | Level 3 |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Impairment of long-lived assets to be disposed of | 28,400 |  |  |  |  |
Discontinued Operations, Held-for-sale | Level 3 | Fair Value, Nonrecurring |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Assets of disposal group held for sale | 52,700 |  | 52,700 |  |  |
CRE Business | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Sale of business |  |  |  |  | $ 2,330,000 |
Pretax loss | 5,900 | $ 10,400 | (24,800) | $ (151,900) |  |
Assets of disposal group held for sale | $ 238,042 |  | $ 238,042 |  |  |
[1] | (1)Derived from the audited consolidated financial statements at December 31, 2020.

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