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CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY - Statements of Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest expense | $ 10,508 | $ 9,715 | $ 8,726 | $ 7,619 | $ 6,660 | $ 6,585 | $ 5,856 | $ 4,813 | $ 36,568 | $ 23,914 | $ 12,113
Non-interest expense | 20,096 | 17,906 | 18,685 | 18,852 | 14,263 | 17,586 | 20,046 | 20,831 | 75,539 | 72,726 | 35,935
Income before income taxes | 9,046 | 11,046 | 10,658 | 9,749 | 15,154 | 12,192 | 9,585 | 5,692 | 40,499 | 42,623 | 20,809
Income tax benefit | 1,426 | 2,076 | 2,123 | 1,937 | 8,545 | 3,575 | 3,029 | 1,481 | 7,562 | 16,630 | 5,876
Net income | $ 7,620 | $ 8,970 | $ 8,535 | $ 7,812 | $ 6,609 | $ 8,617 | $ 6,556 | $ 4,211 | 32,937 | 25,993 | 14,933
Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends from subsidiaries |  |  |  |  |  |  |  |  | 23,705 | 13,907 | 6,473
Other |  |  |  |  |  |  |  |  | 31 | 25 | 0
Total revenue |  |  |  |  |  |  |  |  | 23,736 | 13,932 | 6,473
Interest expense |  |  |  |  |  |  |  |  | 2,121 | 1,857 | 0
Non-interest expense |  |  |  |  |  |  |  |  | 3,147 | 2,979 | 2,949
Total expense |  |  |  |  |  |  |  |  | 5,268 | 4,836 | 2,949
Income before income taxes |  |  |  |  |  |  |  |  | 18,468 | 9,096 | 3,524
Income tax benefit |  |  |  |  |  |  |  |  | (1,136) | (1,210) | (1,029)
Income before equity in undistributed income of subsidiaries |  |  |  |  |  |  |  |  | 19,604 | 10,306 | 4,553
Equity in undistributed income of subsidiaries |  |  |  |  |  |  |  |  | 13,333 | 15,687 | 10,380
Net income |  |  |  |  |  |  |  |  | $ 32,937 | $ 25,993 | $ 14,933

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