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MORTGAGE BANKING OPERATIONS - Servicing Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Servicing fees and other | $ 35,342 | $ 32,037 | $ 39,561
Changes in fair value of single family MSRs due to modeled amortization | (19,669) | (17,754) | (20,670)
Amortization of multifamily and SBA MSRs | (7,581) | (5,657) | (5,214)
Net servicing income | 8,092 | 8,626 | 13,677
Changes in fair value of MSRs due to changes in market inputs and/or assumptions | 7,379 | (19,955) | (16,224)
Mortgage servicing rights, risk management | (859) | 865 | (1,789)
Loan servicing income, discontinued operations | 0 | 0 | (2,103)
Loan servicing income | 7,233 | 9,491 | 9,785
Servicing Contracts |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Net gain (loss) from derivatives hedging | $ (8,238) | $ 20,820 | 14,435
Single family residential mortgage servicing rights | Single family |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Gain (loss) in income during period from discontinued operations before income taxes |  |  | $ (900)

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- Definition Disposal Group, Including Discontinued Operation, Servicing Fees Net1 + References No definition available. + Details
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- Definition The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746 + Details
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