Funds Borrowed - Schedule of Outstanding Balances of Funds Borrowed (Detail) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 874,606 | |||||||
| 2028 | 596,880 | |||||||
| 2029 | 481,346 | |||||||
| 2030 | 257,482 | |||||||
| 2031 | 316,824 | |||||||
| Thereafter | 119,000 | |||||||
| Long term debt | [1] | $ 2,646,138 | $ 2,403,916 | |||||
| Interest Rate | [2] | 4.25% | ||||||
| Deposits [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | [3] | $ 813,106 | ||||||
| 2028 | [3] | 543,130 | ||||||
| 2029 | [1] | 439,846 | ||||||
| 2030 | [3] | 257,482 | ||||||
| 2031 | [3] | 238,824 | ||||||
| Thereafter | [3] | 0 | ||||||
| Long term debt | [1],[3] | $ 2,292,388 | 2,083,335 | |||||
| Interest Rate | [2],[3] | 3.89% | ||||||
| Strategic Partner Collateral Deposits [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 7,000 | |||||||
| 2028 | 0 | |||||||
| 2029 | 0 | |||||||
| 2030 | 0 | |||||||
| 2031 | 0 | |||||||
| Thereafter | 0 | |||||||
| Long term debt | [1] | $ 7,000 | 6,081 | |||||
| Interest Rate | [2] | 3.64% | ||||||
| Privately Placed Notes [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 0 | |||||||
| 2028 | 53,750 | |||||||
| 2029 | 39,000 | |||||||
| 2030 | 0 | |||||||
| 2031 | 75,000 | |||||||
| Thereafter | 22,500 | |||||||
| Long term debt | [1] | $ 190,250 | 146,500 | |||||
| Interest Rate | [2] | 8.31% | ||||||
| SBA Debentures and Borrowings [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 4,500 | |||||||
| 2028 | 0 | |||||||
| 2029 | 2,500 | |||||||
| 2030 | 0 | |||||||
| 2031 | 3,000 | |||||||
| Thereafter | 63,500 | |||||||
| Long term debt | [1] | $ 73,500 | 85,000 | |||||
| Interest Rate | [2] | 4.11% | ||||||
| Trust Preferred Securities [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 0 | |||||||
| 2028 | 0 | |||||||
| 2029 | 0 | |||||||
| 2030 | 0 | |||||||
| 2031 | 0 | |||||||
| Thereafter | 33,000 | |||||||
| Long term debt | [1] | $ 33,000 | 33,000 | |||||
| Interest Rate | [2] | 6.04% | ||||||
| Federal Reserve and Other Borrowings [Member] | ||||||||
| Debt Instrument [Line Items] | ||||||||
| 2027 | $ 50,000 | |||||||
| 2028 | 0 | |||||||
| 2029 | 0 | |||||||
| 2030 | 0 | |||||||
| 2031 | 0 | |||||||
| Thereafter | 0 | |||||||
| Long term debt | [1] | $ 50,000 | $ 50,000 | |||||
| Interest Rate | [2] | 3.75% | ||||||
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| X | ||||||||||
- Definition Debt long term and short term funds borrowed amount. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average interest rate of debt outstanding. No definition available.
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| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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