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Parent Company Only Condensed Financial Information - Schedule of Condensed Statements of Operations (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Condensed Financial Statements Captions [Line Items] |  |  |
Interest expense | $ (57,238) | $ (15,951) | $ (9,629)
Income tax benefit | (7,649) | (7,608) | (7,835)
Net income | 42,964 | 39,427 | 40,546
Comprehensive income (loss) | 53,479 | (27,438) | 34,747
CBI[Member] |  |  |
Condensed Financial Statements Captions [Line Items] |  |  |
Dividends from bank subsidiaries | 28,100 | 26,300 | 19,900
Dividends from non-bank subsidiaries | 1,390 | 1,150 | 1,000
Interest expense | (4,849) | (3,781) | (956)
Pension expense | 150 | 340 | (47)
Other expense, net | (1,518) | (2,384) | (1,004)
Income before equity in undistributed net earnings of subsidiaries | 23,273 | 21,625 | 18,893
Income tax benefit | 1,309 | 1,140 | 425
Equity in undistributed net earnings of subsidiaries | 18,382 | 16,662 | 21,228
Net income | 42,964 | 39,427 | 40,546
Comprehensive income (loss) | $ 53,489 | $ (27,438) | $ 34,747

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