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Non-interest Income and Expense - Components of Other Noninterest Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | $ 51,330 | $ 50,088 | $ 49,765
Asset management and commission income | 5,573 | 4,517 | 3,986
Increase in cash value of life insurance | 3,257 | 3,150 | 2,858
Gain on sale of loans | 1,532 | 1,166 | 2,342
Lease brokerage income | 455 | 441 | 820
Sale of customer checks | 1,216 | 1,383 | 1,167
(Loss) gain on sale of investment securities | (43) | (284) | 0
(Loss) gain on marketable equity securities | 126 | 36 | (340)
Other | 961 | 903 | 2,448
Total other noninterest income | 13,077 | 11,312 | 13,281
Total noninterest income | 64,407 | 61,400 | 63,046
ATM and interchange fees |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | 25,319 | 26,459 | 26,767
Service charges on deposit accounts |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | 19,451 | 17,595 | 16,536
Other service fees |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | 5,301 | 4,732 | 4,274
Mortgage banking service fees |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | 1,739 | 1,808 | 1,887
Change in value of mortgage loan servicing rights |  |  |
Schedule Of Other Noninterest Income And Expense [Line Items] |  |  |
Total service charges and fees | $ (480) | $ (506) | $ 301

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