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Note 28 - Segments - Financial Information by Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | 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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Net interest income | $ 65,263 | $ 62,376 | $ 56,984 | $ 48,760 | $ 46,182 | $ 45,483 | $ 41,584 | $ 37,825 | $ 36,252 | $ 33,695 | $ 33,528 | $ 32,446 | $ 233,383 | $ 171,074 | $ 135,921
Provision for credit losses |  |  |  |  |  |  |  |  |  |  |  |  | 10,257 | (753) | 18,418
All other non-interest income |  |  |  |  |  |  |  |  |  |  |  |  | 53,038 | 38,237 | 28,493
Non-interest expenses | 45,946 | 44,873 | 44,675 | 56,297 | 34,572 | 34,558 | 48,177 | 24,973 | 29,029 | 25,646 | 23,409 | 23,575 | 191,791 | 142,280 | 101,659
Income before income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 120,484 | 95,397 | 67,743
Income tax expense | 9,174 | 9,024 | 7,547 | 1,445 | 7,525 | 6,902 | 864 | 5,461 | 2,685 | 1,591 | 2,348 | 2,250 | 27,190 | 20,752 | 8,874
Net income | 29,910 | 28,540 | 26,902 | 7,942 |  |  |  |  |  |  |  |  | 93,294 | 74,645 | 58,869
Less income attributable to NCI | 93 | 85 | 108 | 36 |  |  |  |  |  |  |  |  | 322 | 0 | 0
Net income attributable to stockholders | 29,817 | $ 28,455 | $ 26,794 | $ 7,906 | 24,589 | $ 23,162 | $ 4,184 | $ 22,710 | 17,736 | $ 14,533 | $ 13,368 | $ 13,232 | 92,972 | 74,645 | 58,869
Total assets | 7,496,261 |  |  |  | 6,646,025 |  |  |  | 4,608,629 |  |  |  | 7,496,261 | 6,646,025 | 4,608,629
Fiduciary and Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management and trust services |  |  |  |  |  |  |  |  |  |  |  |  | 36,111 | 27,613 | 23,406
Commercial Banking [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | 232,971 | 170,775 | 135,587
Provision for credit losses |  |  |  |  |  |  |  |  |  |  |  |  | 10,257 | (753) | 18,418
All other non-interest income |  |  |  |  |  |  |  |  |  |  |  |  | 53,038 | 38,237 | 28,493
Non-interest expenses |  |  |  |  |  |  |  |  |  |  |  |  | 170,348 | 128,091 | 88,820
Income before income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 105,404 | 81,674 | 56,842
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 23,917 | 17,774 | 6,508
Net income |  |  |  |  |  |  |  |  |  |  |  |  | 81,487 | 63,900 |
Less income attributable to NCI |  |  |  |  |  |  |  |  |  |  |  |  | 322 |  |
Net income attributable to stockholders |  |  |  |  |  |  |  |  |  |  |  |  | 81,165 |  | 50,334
Total assets | 7,459,312 |  |  |  | 6,641,916 |  |  |  | 4,604,998 |  |  |  | 7,459,312 | 6,641,916 | 4,604,998
Commercial Banking [Member] | Fiduciary and Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management and trust services |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Investment Management and Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | 412 | 299 | 334
Provision for credit losses |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
All other non-interest income |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Non-interest expenses |  |  |  |  |  |  |  |  |  |  |  |  | 21,443 | 14,189 | 12,839
Income before income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 15,080 | 13,723 | 10,901
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 3,273 | 2,978 | 2,366
Net income |  |  |  |  |  |  |  |  |  |  |  |  | 11,807 | 10,745 |
Less income attributable to NCI |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Net income attributable to stockholders |  |  |  |  |  |  |  |  |  |  |  |  | 11,807 |  | 8,535
Total assets | $ 36,949 |  |  |  | $ 4,109 |  |  |  | $ 3,631 |  |  |  | 36,949 | 4,109 | 3,631
Investment Management and Trust [Member] | Fiduciary and Trust [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management and trust services |  |  |  |  |  |  |  |  |  |  |  |  | $ 36,111 | $ 27,613 | $ 23,406

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