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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
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income before income taxes | $ 15,519 | $ 15,490 | $ 14,623 | $ 17,634 | $ 13,145 | $ 10,965 | $ 13,142 | $ 11,253 | $ 63,266 | $ 48,505 | $ 41,726
Income tax benefit | (3,543) | (3,820) | (3,642) | (4,318) | (3,206) | (2,731) | (3,105) | (2,863) | (15,323) | (11,905) | (15,042)
Net income | $ 11,976 | $ 11,670 | $ 10,981 | $ 13,316 | $ 9,939 | $ 8,234 | $ 10,037 | $ 8,390 | 47,943 | 36,600 | 26,684
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  | 14,833 | (4,169) | 3,525
Comprehensive income |  |  |  |  |  |  |  |  | 62,776 | 32,431 | 30,209
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries |  |  |  |  |  |  |  |  | 38,688 | 21,694 | 18,925
Other income |  |  |  |  |  |  |  |  | 12 | 171 | 1,227
Total income |  |  |  |  |  |  |  |  | 38,700 | 21,865 | 20,152
Operating expenses |  |  |  |  |  |  |  |  | 4,492 | 5,424 | 3,902
Income before income taxes |  |  |  |  |  |  |  |  | 34,208 | 16,441 | 16,250
Income tax benefit |  |  |  |  |  |  |  |  | 1,256 | 1,274 | 864
Income before equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 35,464 | 17,715 | 17,114
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 12,479 | 18,885 | 9,570
Net income |  |  |  |  |  |  |  |  | 47,943 | 36,600 | 26,684
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  | 14,833 | (4,169) | 3,525
Comprehensive income |  |  |  |  |  |  |  |  | $ 62,776 | $ 32,431 | $ 30,209

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