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Mergers and Acquisitions (Details 2) - Heritage Financial Group - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |
Interest income | $ 329,138 | $ 301,226
Interest expense | 28,147 | 21,858
Net interest income | 300,991 | 279,368
Provision for loan and lease losses | 7,530 | 5,050
Noninterest income | 137,231 | 135,379
Noninterest expense | 294,915 | 309,803
Income before income taxes | 135,777 | 99,894
Income taxes | 44,847 | 31,772
Net income | $ 90,930 | $ 68,122
Earnings per share, basic (usd per share) | $ 2.18 | $ 1.69
Earnings per share, diluted (usd per share) | $ 2.17 | $ 1.68

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