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Note 21 - Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Total interest income | $ 52,977 | $ 56,817 | $ 54,181 | $ 52,101 | $ 52,704 | $ 49,830 | $ 40,799 | $ 39,546 |  |  |
Securities gains |  |  |  |  |  |  |  |  | $ (30) |  | $ (88)
Revenue |  |  |  |  |  |  |  |  | 294,844 | $ 224,420 | 165,999
Total interest expense | 13,058 | 16,098 | 16,168 | 15,193 | 13,109 | 11,516 | 8,714 | 7,143 | 60,517 | 40,484 | 19,452
Salaries and employee benefits |  |  |  |  |  |  |  |  | 92,063 | 68,994 | 55,722
Business acquisition related costs |  |  |  |  |  |  |  |  |  | 1,795 | 1,069
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  | 3,582 | 2,086 | 4,310
Disposition costs |  |  |  |  |  |  |  |  | 3,325 |  |
Goodwill impairment |  |  |  |  |  |  |  |  | 3,000 |  |
Income tax benefit | (6,560) | (3,573) | (3,073) | (1,413) | (3,535) | (1,608) | (1,881) | (1,991) | (14,619) | (9,015) | (4,946)
Net income | $ 15,891 | $ 15,095 | $ 13,504 | $ 12,918 | $ 13,316 | $ 8,809 | $ 10,445 | $ 10,550 | 57,408 | 43,120 | 35,707
Parent Company [Member] | Reportable Legal Entities [Member] |  |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | 77 | 88 | 13
Securities gains |  |  |  |  |  |  |  |  |  |  | 6
Other |  |  |  |  |  |  |  |  | 314 | (322) | 3
Revenue |  |  |  |  |  |  |  |  | 77,154 | 54,539 | 45,201
Total interest expense |  |  |  |  |  |  |  |  | 5,836 | 3,637 | 2,658
Salaries and employee benefits |  |  |  |  |  |  |  |  | 8,739 | 6,598 | 5,022
Professional fees |  |  |  |  |  |  |  |  | 1,545 | 1,872 | 1,345
Business acquisition related costs |  |  |  |  |  |  |  |  |  | 1,654 | 1,069
Post-acquisition compensation, transition and integration costs |  |  |  |  |  |  |  |  | 3,171 | 165 | 3,151
Disposition costs |  |  |  |  |  |  |  |  | 1,606 |  |
Goodwill impairment |  |  |  |  |  |  |  |  | 3,000 |  |
Other |  |  |  |  |  |  |  |  | 2,147 | 1,026 | 1,134
Total expenses |  |  |  |  |  |  |  |  | 26,044 | 14,952 | 14,379
Income before income tax benefit |  |  |  |  |  |  |  |  | 51,110 | 39,587 | 30,822
Income tax benefit |  |  |  |  |  |  |  |  | 6,298 | 3,533 | 4,885
Net income |  |  |  |  |  |  |  |  | 57,408 | 43,120 | 35,707
Parent Company [Member] | Reportable Legal Entities [Member] | Bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  | 69,966 | 55,209 | 45,104
Parent Company [Member] | Reportable Legal Entities [Member] | Non-bank Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Equity in net income of bank subsidiaries |  |  |  |  |  |  |  |  | $ 6,797 | $ (436) | $ 75

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