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BUSINESS SEGMENTS - Schedule of Income and Total Assets for Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net interest income | $ 37,212 | $ 35,211 | $ 33,845 | $ 31,793 | $ 31,735 | $ 32,149 | $ 31,971 | $ 31,747 | $ 138,061 | $ 127,602 | $ 120,274
Noninterest income |  |  |  |  |  |  |  |  | 72,243 | 61,760 | 54,696
Total income |  |  |  |  |  |  |  |  | 210,304 | 189,362 | 174,970
Provision for loan losses | 3,750 | 1,600 | 900 | 225 | 2,350 | 5,150 | 4,900 | 20,000 | 6,475 | 32,400 | 4,000
Compensation and benefits |  |  |  |  |  |  |  |  | 81,864 | 77,516 | 70,129
Premises and equipment expense |  |  |  |  |  |  |  |  | 17,165 | 16,377 | 14,735
FDIC expense |  |  |  |  |  |  |  |  | 2,071 | 1,975 | 277
Other noninterest expense |  |  |  |  |  |  |  |  | 25,067 | 29,091 | 19,707
Total noninterest expense |  |  |  |  |  |  |  |  | 132,642 | 157,359 | 108,848
Income before income tax expense | 20,722 | 19,207 | 19,939 | 17,794 | 4,542 | 18,749 | 10,683 | (1,971) | 77,662 | 32,003 | 66,122
Income tax expense | 5,867 | 5,036 | 5,521 | 4,616 | 1,512 | 5,202 | 2,441 | (3,344) | 21,040 | 5,811 | 18,688
Net income | 14,855 | $ 14,171 | $ 14,418 | $ 13,178 | 3,030 | $ 13,547 | $ 8,242 | $ 1,373 | 56,622 | 26,192 | 47,434
Total assets at period end | 6,077,993 |  |  |  | 5,890,442 |  |  |  | 6,077,993 | 5,890,442 | 5,182,879
Banking Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  |  |  | 132,195 | 121,583 | 114,983
Noninterest income |  |  |  |  |  |  |  |  | 17,342 | 19,104 | 14,999
Total income |  |  |  |  |  |  |  |  | 149,537 | 140,687 | 129,982
Provision for loan losses |  |  |  |  |  |  |  |  | 6,475 | 32,400 | 4,000
Compensation and benefits |  |  |  |  |  |  |  |  | 56,970 | 54,044 | 48,925
Premises and equipment expense |  |  |  |  |  |  |  |  | 14,805 | 14,056 | 12,533
FDIC expense |  |  |  |  |  |  |  |  | 2,071 | 1,975 | 277
Other noninterest expense |  |  |  |  |  |  |  |  | 14,407 | 19,694 | 10,932
Total noninterest expense |  |  |  |  |  |  |  |  | 94,728 | 122,169 | 76,667
Income before income tax expense |  |  |  |  |  |  |  |  | 54,809 | 18,518 | 53,315
Income tax expense |  |  |  |  |  |  |  |  | 14,847 | 2,170 | 15,069
Net income |  |  |  |  |  |  |  |  | 39,962 | 16,348 | 38,246
Total assets at period end | 5,973,343 |  |  |  | 5,798,770 |  |  |  | 5,973,343 | 5,798,770 | 5,095,744
Wealth Management Division [Member] |  |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  |  |  | 5,866 | 6,019 | 5,291
Noninterest income |  |  |  |  |  |  |  |  | 54,901 | 42,656 | 39,697
Total income |  |  |  |  |  |  |  |  | 60,767 | 48,675 | 44,988
Provision for loan losses |  |  |  |  |  |  |  |  | 0 | 0 | 0
Compensation and benefits |  |  |  |  |  |  |  |  | 24,894 | 23,472 | 21,204
Premises and equipment expense |  |  |  |  |  |  |  |  | 2,360 | 2,321 | 2,202
FDIC expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other noninterest expense |  |  |  |  |  |  |  |  | 10,660 | 9,397 | 8,775
Total noninterest expense |  |  |  |  |  |  |  |  | 37,914 | 35,190 | 32,181
Income before income tax expense |  |  |  |  |  |  |  |  | 22,853 | 13,485 | 12,807
Income tax expense |  |  |  |  |  |  |  |  | 6,193 | 3,641 | 3,619
Net income |  |  |  |  |  |  |  |  | 16,660 | 9,844 | 9,188
Total assets at period end | $ 104,650 |  |  |  | $ 91,672 |  |  |  | $ 104,650 | $ 91,672 | $ 87,135

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