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SALES OF BRANCH, SUBSIDIARY AND BUSINESS UNITS - Banc Home Loans Sale Additional Information (Details) - USD ($) $ in Thousands |  | 6 Months Ended | 12 Months Ended | 21 Months Ended
--- | --- | --- | --- | ---
Mar. 30, 2017 | Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
MSRs sold |  | $ 28,500 | $ 0 | $ 28,549 | $ 39,345 |
Unpaid balances of conventional agency mortgage loans | $ 3,860,000 |  |  |  |  |
Net gain on disposal |  |  | 0 | 1,439 | 13,796 |
Banc home loans | Disposals |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Cash premium payment | 25,000 |  |  |  |  |
Book value of certain assets sold | $ 2,500 |  |  |  |  |
Performance period following completion of transaction | 38 months |  |  |  |  |
MSRs sold |  |  | 0 | 0 | 37,772 | $ 37,772
Net gain on disposal |  |  | 0 | 1,439 | 13,796 | 15,235
Compensation expense related to the transaction |  | $ 1,000 | $ 0 | $ 1,003 | $ (3,500) | $ (2,497)
Caliber | Banc home loans | Disposals |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Contingent consideration | $ 35,000 |  |  |  |  |
MSRs sold | $ 37,800 |  |  |  |  |

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