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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Mortgage Banking (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total residential loans included in held for sale loans | $ 10,148 | $ 23,988
Residential mortgages | Total residential real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total residential loans included in held for sale loans | 10,100 | 23,700
Forward delivery commitments | 31,300 | 50,600
Sale of loans | 69,200 | 70,400
Net gains on sales of loans | $ 1,900 | $ 2,200

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- Definition Amount of gain (loss) on sale of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107425-111719 + Details
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