Loans and Allowance for Credit Losses - Additional Information (Detail) |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2026
USD ($)
Pool
|
Mar. 31, 2025
USD ($)
Pool
|
Dec. 31, 2025
USD ($)
|
|
| Accounts Notes And Loans Receivable [Line Items] | |||
| Loans | $ 5,364,030,000 | $ 4,145,424,000 | |
| Purchases of government guaranteed loans | 0 | $ 61,987,000 | |
| Unamortized purchase accounting discounts | 22,847,000 | 12,853,000 | |
| Loans purchased at discount | 1,563,591,000 | 627,644,000 | |
| Outstanding commitments on loans | 74,000 | $ 30,000 | |
| Consumer Loans [Member] | |||
| Accounts Notes And Loans Receivable [Line Items] | |||
| Over-draft deposit accounts | 940,000 | 878,000 | |
| Residential Real Estate/Mortgage Loan Pools [Member] | |||
| Accounts Notes And Loans Receivable [Line Items] | |||
| Loans | $ 269,832,000 | $ 252,884,000 | |
| Purchased pools of residential real estate | Pool | 0 | 0 | |