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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 | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 8,076,266 |  | $ 8,150,280
Unamortized net deferred loan fees | 240 |  | (178)
Total loans | $ 8,076,506 |  | 8,150,102
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 | $ 142,359 |  | 143,246
Guaranteed portions of SBA loans included in table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 35,984 |  | 35,462
Unguaranteed portions of SBA loans included in table above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 106,375 |  | 107,784
Sold portions of SBA loans with servicing retained - not included in tables above |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total loans | 344,115 |  | 349,275
Commercial and industrial |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 872,623 |  | 905,862
Commercial and industrial | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 11.00% | 11.00% |
Real estate, commercial | Construction, development & other land loans |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 904,216 |  | 992,980
Real estate, commercial | Construction, development & other land loans | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 11.00% | 12.00% |
Real estate, commercial | Commercial real estate - owner occupied |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 1,238,759 |  | 1,259,022
Real estate, commercial | Commercial real estate - owner occupied | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 15.00% | 16.00% |
Real estate, commercial | Commercial real estate - non owner occupied |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 2,524,221 |  | 2,528,060
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% | 31.00% |
Real estate, commercial | Multi-family real estate |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 457,142 |  | 421,376
Real estate, commercial | Multi-family real estate | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 6.00% | 5.00% |
Real estate, mortgage | Residential 1-4 family real estate |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 1,684,173 |  | 1,639,469
Real estate, mortgage | Residential 1-4 family real estate | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 21.00% | 20.00% |
Real estate, mortgage | Home equity loans/lines of credit |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 328,466 |  | 335,068
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% | 4.00% |
Consumer loans |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Total | $ 66,666 |  | $ 68,443
Consumer loans | Financing Receivable | Loan Category Concentration Risk |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Percentage | 1.00% | 1.00% |

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