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Note 21 - Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 30, 2020 | Nov. 30, 2020 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Total interest income |  |  | $ 49,851 | $ 50,890 | $ 48,650 | $ 48,982 | $ 52,977 | $ 56,817 | $ 54,181 | $ 52,101 |  |  |
Securities gains |  |  |  |  |  |  |  |  |  |  | $ 2,484 | $ (30) |
Revenue |  |  |  |  |  |  |  |  |  |  | 312,171 | 294,844 | $ 224,420
Total interest expense |  |  | 6,144 | 6,309 | 7,694 | 11,276 | 13,058 | 16,098 | 16,168 | 15,193 | 31,423 | 60,517 | 40,484
Salaries and employee benefits |  |  |  |  |  |  |  |  |  |  | 96,268 | 92,063 | 68,994
Acquisition costs |  |  |  |  |  |  |  |  |  |  |  |  | 1,795
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  |  |  | 214 | 3,582 | 2,086
Disposition costs |  |  |  |  |  |  |  |  |  |  | 690 | 3,325 |
Goodwill impairment | $ 0 | $ 0 |  |  |  |  |  |  |  |  | 500 | 3,000 |
Income tax benefit |  |  | (4,009) | (4,016) | (2,798) | (1,884) | (6,560) | (3,573) | (3,073) | (1,413) | (12,707) | (14,619) | (9,015)
Net income |  |  | $ 18,271 | $ 17,344 | $ 13,739 | $ 11,228 | $ 15,891 | $ 15,095 | $ 13,504 | $ 12,918 | 60,582 | 57,408 | 43,120
Parent Company [Member] | Reportable Legal Entities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  |  |  | 29 | 77 | 88
Other |  |  |  |  |  |  |  |  |  |  | 289 | 314 | (322)
Revenue |  |  |  |  |  |  |  |  |  |  | 79,681 | 77,154 | 54,539
Total interest expense |  |  |  |  |  |  |  |  |  |  | 6,662 | 5,836 | 3,637
Salaries and employee benefits |  |  |  |  |  |  |  |  |  |  | 11,825 | 8,739 | 6,598
Professional fees |  |  |  |  |  |  |  |  |  |  | 2,558 | 1,545 | 1,872
Acquisition costs |  |  |  |  |  |  |  |  |  |  |  |  | 1,654
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  |  |  | 145 | 3,171 | 165
Disposition costs |  |  |  |  |  |  |  |  |  |  | 312 | 1,606 |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  | 500 | 3,000 |
Other |  |  |  |  |  |  |  |  |  |  | 2,505 | 2,147 | 1,026
Total expenses |  |  |  |  |  |  |  |  |  |  | 24,507 | 26,044 | 14,952
Income before income tax benefit |  |  |  |  |  |  |  |  |  |  | 55,174 | 51,110 | 39,587
Income tax benefit |  |  |  |  |  |  |  |  |  |  | 5,408 | 6,298 | 3,533
Net income |  |  |  |  |  |  |  |  |  |  | 60,582 | 57,408 | 43,120
Parent Company [Member] | Reportable Legal Entities [Member] | Bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  |  |  | 79,624 | 69,966 | 55,209
Parent Company [Member] | Reportable Legal Entities [Member] | Non-bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  |  |  | $ (261) | $ 6,797 | $ (436)

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