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MORTGAGE BANKING OPERATIONS - SF MSR Roll Forward (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Additions and amortization: |  |  |
Amortization | $ 9,951 | $ 19,669 | $ 17,754
Changes in fair value assumptions | (16,739) | (7,379) | 19,955
Ending balance | 76,617 |  |
Single family |  |  |
Servicing Asset at Amortized Value, Balance [Roll Forward] |  |  |
Beginning balance | 61,584 | 49,966 | 68,109
Additions and amortization: |  |  |
Originations | 8,245 | 23,908 | 19,424
Amortization | (9,951) | (19,669) | (17,754)
Net additions and amortization | (1,706) | 4,239 | 1,670
Changes in fair value assumptions | 16,739 | 7,379 | (19,813)
Ending balance | $ 76,617 | $ 61,584 | $ 49,966

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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 + Details
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