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DISCONTINUED OPERATIONS - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 branch | Dec. 31, 2019 USD ($) saleOfRight | Mar. 31, 2019 USD ($) saleOfRight
Agency debentures | Single family |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Mortgage servicing rights, unpaid principle balance, sold, number of sales | saleOfRight |  | 2 | 2
Mortgage servicing rights, unpaid principal balance, sold |  | $ 14,300.0 | $ 14,300.0
Gain (loss) in income during period from discontinued operations before income taxes |  | $ (0.9) |
HLC Based Mortgage Banking Operations |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Home loan centers sold | branch | 47 |  |

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