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Condensed Financial Information of Parent Company - Schedule of Condensed Statement of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Income Statements, Captions [Line Items] |  |  |
Net interest income after (release of) provision for credit losses | $ 44,456 | $ 44,515 | $ 47,166
Gain on sales of investment securities | 51 | 1,075 | 19
Total net revenue | 154,147 | 144,956 | 157,235
Expenses: |  |  |
Salaries and employee benefits | 92,155 | 88,062 | 91,083
Other operating | 16,743 | 15,387 | 18,065
Total operating expense | 120,326 | 114,615 | 119,769
Income before income tax expense | 33,821 | 30,341 | 37,466
Income tax expense | 5,217 | 5,165 | 7,062
Net income | 28,604 | 25,176 | 30,404
Parent Company |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Income from subsidiaries – management fees | 3,115 | 2,854 | 2,599
Information services revenue | 104,426 | 95,078 | 106,198
Net interest income after (release of) provision for credit losses | 11,316 | 10,932 | 15,713
Gain on sales of investment securities | 51 | 1,075 | 19
Other income | 919 | 458 | 518
Total net revenue | 119,827 | 110,397 | 125,047
Expenses: |  |  |
Salaries and employee benefits | 80,434 | 77,577 | 81,432
Other operating | 27,406 | 25,347 | 26,136
Total operating expense | 107,840 | 102,924 | 107,568
Income before income tax expense | 11,987 | 7,473 | 17,479
Income tax expense | 635 | 340 | 2,860
Income before undistributed income of subsidiaries | 11,352 | 7,133 | 14,619
Equity in undistributed income of subsidiaries | 17,252 | 18,043 | 15,785
Net income | $ 28,604 | $ 25,176 | $ 30,404

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