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Segment Reporting - Financial Information for Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Financial information for the Company's operating segments |  |  |
Net interest income (loss) | $ 89,240 | $ 74,015 |
Provision for loan losses | 1,750 | 1,500 |
Noninterest income | 33,953 | 32,021 |
Noninterest expense | 77,944 | 69,309 |
Income before income taxes | 43,499 | 35,227 |
Income tax expense (benefit) | 9,673 | 11,255 |
Net income (loss) | 33,826 | 23,972 |
Total assets | 10,238,313 | 8,764,711 | $ 9,829,981
Goodwill | 611,046 | 470,534 | 611,046
Community Banks |  |  |
Financial information for the Company's operating segments |  |  |
Goodwill | 608,279 |  | 608,279
Insurance |  |  |
Financial information for the Company's operating segments |  |  |
Goodwill | 2,767 |  | $ 2,767
Operating Segments | Community Banks |  |  |
Financial information for the Company's operating segments |  |  |
Net interest income (loss) | 91,427 | 75,956 |
Provision for loan losses | 1,750 | 1,500 |
Noninterest income | 27,918 | 26,578 |
Noninterest expense | 72,633 | 64,221 |
Income before income taxes | 44,962 | 36,813 |
Income tax expense (benefit) | 10,167 | 12,110 |
Net income (loss) | 34,795 | 24,703 |
Total assets | 10,135,478 | 8,673,576 |
Goodwill | 608,279 | 467,767 |
Operating Segments | Insurance |  |  |
Financial information for the Company's operating segments |  |  |
Net interest income (loss) | 106 | 92 |
Provision for loan losses | 0 | 0 |
Noninterest income | 2,772 | 2,549 |
Noninterest expense | 1,731 | 1,692 |
Income before income taxes | 1,147 | 949 |
Income tax expense (benefit) | 297 | 375 |
Net income (loss) | 850 | 574 |
Total assets | 24,125 | 24,032 |
Goodwill | 2,767 | 2,767 |
Operating Segments | Wealth Management |  |  |
Financial information for the Company's operating segments |  |  |
Net interest income (loss) | 313 | 487 |
Provision for loan losses | 0 | 0 |
Noninterest income | 3,527 | 3,119 |
Noninterest expense | 3,392 | 2,996 |
Income before income taxes | 448 | 610 |
Income tax expense (benefit) | 0 | 0 |
Net income (loss) | 448 | 610 |
Total assets | 61,800 | 54,537 |
Goodwill | 0 | 0 |
Other |  |  |
Financial information for the Company's operating segments |  |  |
Net interest income (loss) | (2,606) | (2,520) |
Provision for loan losses | 0 | 0 |
Noninterest income | (264) | (225) |
Noninterest expense | 188 | 400 |
Income before income taxes | (3,058) | (3,145) |
Income tax expense (benefit) | (791) | (1,230) |
Net income (loss) | (2,267) | (1,915) |
Total assets | 16,910 | 12,566 |
Goodwill | $ 0 | $ 0 |

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