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Loans - Summary of Portfolio Loans Individually Evaluated for Impairment by Category (Details) - Portfolio loans, net - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | $ 15,067 |  | $ 15,067 |  |  |  |  |  |
Total nonperforming loans | 42,252 |  | 42,252 |  |  | $ 38,507 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | (1,832) | $ (3,664) | (8,306) | $ (3,968) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 963 | 3,356 | 1,790 | 4,157 |  |  |  |  |
Financing receivable, allowance for credit loss | 128,185 | 110,270 | 128,185 | 110,270 | $ 131,527 | 136,671 | $ 92,187 | $ 69,995 | $ 43,288
Commercial and industrial |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 10,215 |  | 10,215 |  |  | 8,316 |  |  |
Total nonperforming loans | 24,844 |  | 24,844 |  |  | 21,770 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | (1,451) | (3,303) | (5,190) | (3,366) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 700 | 293 | 1,027 | 797 |  |  |  |  |
Financing receivable, allowance for credit loss | 53,351 | 50,139 | 53,351 | 50,139 | 55,941 | 58,812 | 45,981 | 33,949 | 27,455
Commercial - investor owned |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 441 |  | 441 |  |  | 716 |  |  |
Total nonperforming loans | 7,359 |  | 7,359 |  |  | 9,579 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | (224) | (2,372) | (226) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 39 | 2,752 | 73 | 2,766 |  |  |  |  |
Financing receivable, allowance for credit loss | 36,003 | 25,019 | 36,003 | 25,019 | 33,105 | 32,062 | 19,892 | 16,656 | 5,935
Commercial - owner occupied |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 1,616 |  | 1,616 |  |  | 6,024 |  |  |
Total nonperforming loans | 5,885 |  | 5,885 |  |  | 2,940 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | (216) | 0 | (244) | 0 |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 10 | 11 | 19 | 80 |  |  |  |  |
Financing receivable, allowance for credit loss | 15,564 | 11,088 | 15,564 | 11,088 | 20,219 | 17,012 | 9,477 | 7,414 | 4,873
Construction and land development |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 100 |  | 100 |  |  | 0 |  |  |
Total nonperforming loans | 100 |  | 100 |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 | (31) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 32 | 29 | 267 | 69 |  |  |  |  |
Financing receivable, allowance for credit loss | 11,632 | 15,962 | 11,632 | 15,962 | 14,557 | 21,413 | 9,895 | 7,577 | 2,611
Residential real estate |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 2,695 |  | 2,695 |  |  | 3,190 |  |  |
Total nonperforming loans | 4,038 |  | 4,038 |  |  | 4,189 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | (44) | (32) | (315) | (154) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 161 | 226 | 304 | 383 |  |  |  |  |
Financing receivable, allowance for credit loss | 4,677 | 6,333 | 4,677 | 6,333 | 4,305 | 4,585 | 5,395 | 3,349 | 1,280
Other |  |  |  |  |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |  |  |  |  |
Nonaccrual loans with no allowance | 0 |  | 0 |  |  | 18,246 |  |  |
Total nonperforming loans | 26 |  | 26 |  |  | 29 |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | (121) | (105) | (185) | (191) |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 21 | 45 | 100 | 62 |  |  |  |  |
Financing receivable, allowance for credit loss | $ 6,958 | $ 1,729 | $ 6,958 | $ 1,729 | $ 3,400 | $ 2,787 | $ 1,547 | $ 1,050 | $ 1,134

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