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Loans, Allowance for Credit Losses, and Asset Quality Information - Summary of Major Categories of Total Loans Outstanding (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 8,150,280 | $ 6,666,548
Unamortized net deferred loan fees | (178) | (1,403)
Total loans | $ 8,150,102 | $ 6,665,145
Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 100.00% | 100.00%
Total SBA loans included in the table above |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans | $ 143,246 | $ 148,803
Guaranteed portions of SBA Loans included in table above |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans | 35,462 | 31,893
Unguaranteed portions of SBA Loans included in table above |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans | 107,784 | 116,910
Sold portions of SBA loans with servicing retained - not included in table above |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Total loans | 349,275 | 392,370
Commercial and industrial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 905,862 | $ 641,941
Commercial and industrial | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 11.00% | 9.00%
Real estate, commercial | Construction, development & other land loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 992,980 | $ 934,176
Real estate, commercial | Construction, development & other land loans | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 12.00% | 14.00%
Real estate, commercial | Commercial real estate - owner occupied |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 1,259,022 | $ 1,036,270
Real estate, commercial | Commercial real estate - owner occupied | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 16.00% | 16.00%
Real estate, commercial | Commercial real estate - non owner occupied |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 2,528,060 | $ 2,123,811
Real estate, commercial | Commercial real estate - non owner occupied | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 31.00% | 32.00%
Real estate, commercial | Multi-family real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 421,376 | $ 350,180
Real estate, commercial | Multi-family real estate | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 5.00% | 5.00%
Real estate, mortgage | Residential 1-4 family real estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 1,639,469 | $ 1,195,785
Real estate, mortgage | Residential 1-4 family real estate | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 20.00% | 18.00%
Real estate, mortgage | Home equity loans/lines of credit |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 335,068 | $ 323,726
Real estate, mortgage | Home equity loans/lines of credit | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 4.00% | 5.00%
Consumer loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Allowance for credit loss, fee, and loan in process | $ 68,443 | $ 60,659
Consumer loans | Financing Receivable | Loan Category Concentration Risk |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Percentage | 1.00% | 1.00%

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