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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Performance Status (Details) - USD ($) $ in Thousands |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2023 | Jun. 15, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | $ 11,889,120 |  | $ 13,144,894 | $ 11,889,120 | $ 13,144,894 |
Amount of loans accruing interest | $ 500 |  | 1,900 | $ 500 | 1,900 |
Threshold period past due | 30 days |  |  | 30 days |  |
Purchased-credit-impaired loans | $ 157,200 | $ 194,455 | 8,300 |  |  |
Purchases |  |  |  | $ 757,188 | 483,980 | $ 1,907,222
Amount at par value of financing receivable purchased with credit deterioration |  | 228,700 |  |  |  |
Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 74,700 |  | 998,200 | 74,700 | 998,200 |
Specialty lending | FDIC |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Purchases |  | 631,000 |  |  |  |
Amount at par value of financing receivable purchased with credit deterioration |  | $ 228,700 |  |  |  |
Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 93,956 |  | 75,345 | 93,956 | 75,345 |
30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 55,532 |  | 38,471 | 55,532 | 38,471 |
30-59 Days past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 700 |  | 600 | 700 | 600 |
60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 14,600 |  | 15,570 | 14,600 | 15,570 |
90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 23,824 |  | 21,304 | 23,824 | 21,304 |
Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 11,795,164 |  | 13,069,549 | 11,795,164 | 13,069,549 |
Loans and leases not past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable |  |  | 998,200 |  | 998,200 |
Greater than 60 Days past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 48,500 |  |  | 48,500 |  |
Equal to or greater than 60 Days past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable |  |  | 36,000 |  | 36,000 |
Commercial and industrial, including specialty lending |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 6,211,105 |  | 6,672,830 | 6,211,105 | 6,672,830 |
Commercial and industrial, including specialty lending | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 5,991 |  | 5,255 | 5,991 | 5,255 |
Commercial and industrial, including specialty lending | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 1,516 |  | 3,123 | 1,516 | 3,123 |
Commercial and industrial, including specialty lending | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 322 |  | 717 | 322 | 717 |
Commercial and industrial, including specialty lending | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 4,153 |  | 1,415 | 4,153 | 1,415 |
Commercial and industrial, including specialty lending | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 6,205,114 |  | 6,667,575 | 6,205,114 | 6,667,575 |
Multifamily |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 2,138,622 |  | 2,213,019 | 2,138,622 | 2,213,019 |
Multifamily | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 16,003 |  | 17,044 | 16,003 | 17,044 |
Multifamily | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 16,003 |  | 10,684 | 16,003 | 10,684 |
Multifamily | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 5,217 | 0 | 5,217 |
Multifamily | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 1,143 | 0 | 1,143 |
Multifamily | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 2,122,619 |  | 2,195,975 | 2,122,619 | 2,195,975 |
Commercial real estate owner occupied |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 797,319 |  | 885,339 | 797,319 | 885,339 |
Commercial real estate owner occupied | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 10,090 |  | 7,877 | 10,090 | 7,877 |
Commercial real estate owner occupied | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 449 |  | 5,173 | 449 | 5,173 |
Commercial real estate owner occupied | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 3,814 |  | 0 | 3,814 | 0 |
Commercial real estate owner occupied | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 5,827 |  | 2,704 | 5,827 | 2,704 |
Commercial real estate owner occupied | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 787,229 |  | 877,462 | 787,229 | 877,462 |
Commercial real estate non-owner occupied |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 1,177,650 |  | 1,290,730 | 1,177,650 | 1,290,730 |
Commercial real estate non-owner occupied | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 16,653 |  | 2,147 | 16,653 | 2,147 |
Commercial real estate non-owner occupied | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 16,653 |  | 2,136 | 16,653 | 2,136 |
Commercial real estate non-owner occupied | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 0 | 0 | 0 |
Commercial real estate non-owner occupied | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 11 | 0 | 11 |
Commercial real estate non-owner occupied | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 1,160,997 |  | 1,288,583 | 1,160,997 | 1,288,583 |
Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 166,393 |  | 162,009 | 166,393 | 162,009 |
Construction | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 0 | 0 | 0 |
Construction | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 0 | 0 | 0 |
Construction | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 0 | 0 | 0 |
Construction | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 0 |  | 0 | 0 | 0 |
Construction | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 166,393 |  | 162,009 | 166,393 | 162,009 |
Residential real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 484,435 |  | 497,952 | 484,435 | 497,952 |
Purchases |  |  |  | 4,238 | 207,251 | $ 92,939
Residential real estate | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 16,523 |  | 9,523 | 16,523 | 9,523 |
Residential real estate | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 10,504 |  | 5,208 | 10,504 | 5,208 |
Residential real estate | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 2,255 |  | 1,157 | 2,255 | 1,157 |
Residential real estate | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 3,764 |  | 3,158 | 3,764 | 3,158 |
Residential real estate | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 467,912 |  | 488,429 | 467,912 | 488,429 |
Manufactured housing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 38,670 |  | 45,076 | 38,670 | 45,076 |
Manufactured housing | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 4,364 |  | 4,784 | 4,364 | 4,784 |
Manufactured housing | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 1,152 |  | 901 | 1,152 | 901 |
Manufactured housing | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 343 |  | 537 | 343 | 537 |
Manufactured housing | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 2,869 |  | 3,346 | 2,869 | 3,346 |
Manufactured housing | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 34,306 |  | 40,292 | 34,306 | 40,292 |
Installment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 874,926 |  | 1,377,939 | 874,926 | 1,377,939 |
Installment | Total past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 24,332 |  | 28,715 | 24,332 | 28,715 |
Installment | 30-59 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 9,255 |  | 11,246 | 9,255 | 11,246 |
Installment | 60-89 Days past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 7,866 |  | 7,942 | 7,866 | 7,942 |
Installment | 90 Days or more past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | 7,211 |  | 9,527 | 7,211 | 9,527 |
Installment | Loans and leases not past due |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans and leases receivable | $ 850,594 |  | $ 1,349,224 | $ 850,594 | $ 1,349,224 |

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