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MORTGAGE BANKING OPERATIONS - Loans Sold (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Proceeds from sale of loans originated as held for sale | $ 538,900 | $ 857,260 | $ 2,135,360 | $ 1,895,342
Commercial loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Proceeds from sale of loans originated as held for sale | 69,810 | 170,980 | 465,948 | 502,059
Single family |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Proceeds from sale of loans originated as held for sale | $ 469,090 | $ 686,280 | $ 1,669,412 | $ 1,393,283

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- Definition The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3461-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 + Details
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