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Condensed Parent Company Financial Statements- Summary of Income Statement of Parent Company (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
OPERATING INCOME |  |  |
Interest on interest-bearing deposits | $ 58,848 | $ 4,366 | $ 6,049
OPERATING EXPENSE |  |  |
Other | 53,258 | 54,051 | 43,859
Allocated income tax benefit | (44,332) | (40,768) | (23,926)
Amortization of stock-based compensation arrangements of subsidiaries | (1,941) | (2,133) | (1,516)
Net income | 193,100 | 167,630 | 99,586
Parent Company [Member] |  |  |
OPERATING INCOME |  |  |
Dividends from subsidiaries | 93,139 | 54,480 | 50,872
Interest on interest-bearing deposits | 94 | 41 | 1
Other | 1,338 | 1,071 | 886
Total operating income | 94,571 | 55,592 | 51,759
OPERATING EXPENSE |  |  |
Interest | 4,122 | 3,130 | 1,965
Other | 7,190 | 3,340 | 3,317
Total operating expense | 11,312 | 6,470 | 5,282
Income before taxes | 83,259 | 49,122 | 46,477
Allocated income tax benefit | 5,857 | 4,191 | 2,610
Income before equity in undistributed earnings of subsidiaries | 89,116 | 53,313 | 49,087
Equity in undistributed earnings of subsidiaries | 105,817 | 116,365 | 51,955
Amortization of stock-based compensation arrangements of subsidiaries | (1,833) | (2,048) | (1,456)
Net income | $ 193,100 | $ 167,630 | $ 99,586

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