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v3.23.3

Loans - Narrative (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) loan | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) loan | Dec. 31, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium) |  |  | $ 9,100,000 |  | $ 11,900,000 |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available | $ 3,900,000,000 |  | 3,900,000,000 |  | 2,800,000,000 |  |  |
Proceeds from sale of SBA loans | 33,300,000 | $ 0 | 42,100,000 | $ 0 |  |  |  |
Gain on sale of SBA loans | 1,500,000 |  | 2,015,000 | 0 |  |  |  |
Consumer mortgage loans secured by residential real estate in process of foreclosure | 1,000,000 |  | 1,000,000 |  | 0 |  |  |
Allowance for credit loss adjustment | 39,300,000 |  | 39,300,000 |  |  |  |  |
Nonperforming loan balances, excluding government guaranteed balances | 6,000,000 |  | 6,000,000 |  | 6,700,000 |  |  |
Term Extension |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Default subsequent to term extension |  |  | 0 |  |  |  |  |
Other Assets |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Accrued interest receivable | 64,500,000 |  | 64,500,000 |  | 48,100,000 |  |  |
Enterprise Value Lending Portfolio Niche Segment [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Allowance for credit loss adjustment | 13,800,000 |  | 13,800,000 |  |  |  |  |
Non-Covered Loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing receivable, allowance for credit loss | 142,133,000 | 140,572,000 | 142,133,000 | 140,572,000 | 136,932,000 | $ 141,319,000 | $ 140,546,000 | $ 145,041,000
Interest income on nonaccrual loans | 0 | $ 0 | 0 | $ 0 |  |  |  |
Number of loans restructured | loan |  | 0 |  | 0 |  |  |  |
Number of troubled debt restructuring subsequently defaulted | loan |  | 0 |  | 0 |  |  |  |
Non-Covered Loans | Enterprise Value Lending Portfolio Niche Segment [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing receivable, allowance for credit loss | 21,700,000 |  | 21,700,000 |  |  |  |  |
Non-Covered Loans | Agriculture Portfolio Niche Segment [Member] |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing receivable, allowance for credit loss |  |  |  |  | 16,100,000 |  |  |
Non-Covered Loans | Commercial and industrial |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing receivable, allowance for credit loss | 62,476,000 | $ 69,168,000 | 62,476,000 | $ 69,168,000 | $ 53,835,000 | $ 60,318,000 | $ 65,646,000 | $ 63,825,000
Cumulative Effect, Period Of Adoption, Adjustment | Non-Covered Loans |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |
Financing receivable, allowance for credit loss | $ 12,900,000 |  | $ 12,900,000 |  |  |  |  |

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