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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
MSRs sold |  | $ 28,500 | $ 28,549 | $ 39,345 | $ 5,382 |
Net gain on disposal |  |  | 1,439 | 13,796 | 0 |
Banc Home Loan | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
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 |  |  |  |  |
Income from earn-out |  |  | 2,800 | 1,100 |  | $ 4,000
MSRs sold | 37,800 |  | 28,500 | 37,772 |  | 37,772
Net gain on disposal |  |  | $ 1,439 | $ 13,796 | $ 0 | $ 15,235
Reversal Of Accrued Liabilities |  | $ 1,000 |  |  |  |
Buyout Option, Future Earn-Out Receivable | Banc Home Loan | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Contingent consideration | 35,000 |  |  |  |  |
Caliber |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Unpaid balances of conventional agency mortgage loans | $ 3,860,000 |  |  |  |  |

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