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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements Captions [Line Items] |  |  |
Interest expense | $ (6,317) | $ (10,138) | $ (12,954)
Income tax benefit | (7,017) | (4,940) | (5,683)
Net income | 40,546 | 32,192 | 33,878
Comprehensive income | 34,747 | 39,937 | 42,204
CBI[Member] |  |  |
Condensed Financial Statements Captions [Line Items] |  |  |
Dividends from bank subsidiaries | 19,900 | 15,300 | 13,300
Dividends from non-bank subsidiaries | 1,000 | 440 |
Interest expense | (956) | (945) | (1,423)
Pension expense | (47) | (25) | 176
Other expense, net | (1,004) | (1,241) | (1,107)
Income (loss) before equity in undistributed net earnings of subsidiaries | 18,893 | 13,529 | 10,946
Income tax benefit | 425 | 475 | 494
Equity in undistributed net earnings of subsidiaries | 21,228 | 18,188 | 22,438
Net income | 40,546 | 32,192 | 33,878
Comprehensive income | $ 34,747 | $ 39,937 | $ 42,204

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