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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, 2023 | Dec. 31, 2022 | Dec. 31, 2021
OPERATING INCOME |  |  |
Interest on interest-bearing deposits | $ 119,260 | $ 58,848 | $ 4,366
OPERATING EXPENSE |  |  |
Other | 50,009 | 53,258 | 54,051
Allocated income tax benefit | (57,483) | (44,332) | (40,768)
Amortization of stock-based compensation arrangements of subsidiaries | (2,999) | (1,941) | (2,133)
Net income | 212,465 | 193,100 | 167,630
Parent Company [Member] |  |  |
OPERATING INCOME |  |  |
Dividends from subsidiaries | 137,275 | 93,139 | 54,480
Interest on interest-bearing deposits | 1,178 | 94 | 41
Other | 726 | 1,338 | 1,071
Total operating income | 139,179 | 94,571 | 55,592
OPERATING EXPENSE |  |  |
Interest | 4,122 | 4,122 | 3,130
Other | 3,206 | 7,190 | 3,340
Total operating expense | 7,328 | 11,312 | 6,470
Income before taxes | 131,851 | 83,259 | 49,122
Allocated income tax benefit | 2,249 | 5,857 | 4,191
Income before equity in undistributed earnings of subsidiaries | 134,100 | 89,116 | 53,313
Equity in undistributed earnings of subsidiaries | 81,275 | 105,817 | 116,365
Amortization of stock-based compensation arrangements of subsidiaries | (2,910) | (1,833) | (2,048)
Net income | $ 212,465 | $ 193,100 | $ 167,630

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