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Business Combinations and Divestitures - Schedule of Supplemental Pro Forma Information on Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
FBD |  |  |  |
Business Acquisition, Pro Forma Information [Abstract] |  |  |  |
Net interest income | $ 65,694 | $ 44,683 | $ 176,441 | $ 125,098
Noninterest income | 7,167 | 5,404 | 19,679 | 40,072
Net income | $ 8,371 | $ 10,595 | $ 34,179 | $ 32,291
Basic earnings per common share | $ 0.31 | $ 0.44 | $ 1.31 | $ 1.42
Diluted earnings per common share | $ 0.31 | $ 0.43 | $ 1.30 | $ 1.39
SCC |  |  |  |
Business Acquisition, Pro Forma Information [Abstract] |  |  |  |
Net interest income | $ 62,269 | $ 40,147 | $ 163,916 | $ 111,756
Noninterest income | 6,159 | 4,260 | 16,618 | 37,028
Net income | $ 8,578 | $ 9,804 | $ 33,458 | $ 30,065
Basic earnings per common share | $ 0.32 | $ 0.48 | $ 1.35 | $ 1.55
Diluted earnings per common share | $ 0.32 | $ 0.47 | $ 1.33 | $ 1.51
Total |  |  |  |
Business Acquisition, Pro Forma Information [Abstract] |  |  |  |
Net interest income | $ 66,181 | $ 45,318 | $ 178,188 | $ 126,966
Noninterest income | 7,267 | 5,493 | 20,121 | 40,442
Net income | $ 7,778 | $ 10,617 | $ 34,013 | $ 32,441
Basic earnings per common share | $ 0.29 | $ 0.43 | $ 1.30 | $ 1.40
Diluted earnings per common share | $ 0.29 | $ 0.43 | $ 1.28 | $ 1.37

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