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Loans Receivable and Allowance for Credit Losses (Loan Purchases, Sales and Transfers) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | $ 163,780 | $ 89,394 | $ 411,416 | $ 253,302
Sales | 169,830 | 124,084 | 427,427 | 306,342
Purchases | 203,291 | 18,132 | 745,717 | 163,822
Allowance for loan and lease losses, Loans transferred from held-for-investment to held-for-sales, write-offs | 3,600 | 2,800 | 4,900 | 2,800
Net gains on sales of loans | 3,329 | 361 | 6,601 | 1,443
Commercial and industrial (“C&I”) | Originated |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales | 143,300 |  | 341,900 |
Commercial and industrial (“C&I”) | Single-family residential | Originated |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales |  | 112,300 |  | 294,600
Loans sold in secondary market | Purchased |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales | 26,500 | 11,800 | 85,500 | 11,800
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 117,196 | 89,394 | 327,781 | 246,052
Sales | 118,851 | 92,237 | 329,233 | 248,895
Purchases | 65,354 | 0 | 310,447 | 143,086
Commercial lending | Commercial real estate (“CRE”) |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 24,120 |  | 61,171 | 7,250
Sales | 24,120 |  | 61,171 | 7,250
Purchases | 0 |  | 0 | 0
Commercial lending | Real estate loan | Multifamily residential |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale |  | 0 | 0 | 0
Sales |  | 0 | 0 | 0
Purchases |  | 838 | 370 | 2,358
Commercial lending | Construction and land |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 17,226 |  | 17,226 |
Sales | 19,900 |  | 19,900 |
Purchases | 0 |  | 0 |
Consumer lending | Real estate loan | Single-family residential |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 5,238 | 0 | 5,238 | 0
Sales | 6,959 | 31,847 | 17,123 | 50,197
Purchases | $ 137,937 | $ 17,294 | $ 434,900 | $ 18,378

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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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