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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Financial information for the Company's operating segments |  |  |  |  |
Net interest income (loss) | $ 79,603 | $ 77,157 | $ 153,618 | $ 147,211 |
Provision for loan losses | 1,750 | 1,430 | 3,250 | 3,230 |
Noninterest income | 34,265 | 35,586 | 66,286 | 68,888 |
Noninterest expense | 74,841 | 77,259 | 144,150 | 147,073 |
Income before income taxes | 37,277 | 34,054 | 72,504 | 65,796 |
Income tax expense (benefit) | 11,993 | 11,154 | 23,248 | 21,680 |
Net income (loss) | 25,284 | 22,900 | 49,256 | 44,116 |
Total assets | 8,872,272 | 8,529,566 | 8,872,272 | 8,529,566 | $ 8,699,851
Goodwill | 470,534 | 470,534 | 470,534 | 470,534 | 470,534
Community Banks |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Goodwill | 467,767 |  | 467,767 |  | 467,767
Insurance |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Goodwill | 2,767 |  | 2,767 |  | $ 2,767
Operating Segments | Community Banks |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Net interest income (loss) | 81,392 | 77,564 | 157,348 | 148,385 |
Provision for loan losses | 1,750 | 1,425 | 3,250 | 3,238 |
Noninterest income | 28,592 | 29,172 | 55,170 | 56,743 |
Noninterest expense | 70,018 | 72,448 | 134,239 | 137,659 |
Income before income taxes | 38,216 | 32,863 | 75,029 | 64,231 |
Income tax expense (benefit) | 12,712 | 10,952 | 24,822 | 21,591 |
Net income (loss) | 25,504 | 21,911 | 50,207 | 42,640 |
Total assets | 8,776,737 | 8,429,596 | 8,776,737 | 8,429,596 |
Goodwill | 467,767 | 467,767 | 467,767 | 467,767 |
Operating Segments | Insurance |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Net interest income (loss) | 124 | 88 | 216 | 174 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Noninterest income | 2,264 | 2,280 | 4,813 | 5,280 |
Noninterest expense | 1,766 | 1,741 | 3,458 | 3,477 |
Income before income taxes | 622 | 627 | 1,571 | 1,977 |
Income tax expense (benefit) | 238 | 243 | 613 | 773 |
Net income (loss) | 384 | 384 | 958 | 1,204 |
Total assets | 24,746 | 21,484 | 24,746 | 21,484 |
Goodwill | 2,767 | 2,767 | 2,767 | 2,767 |
Operating Segments | Wealth Management |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Net interest income (loss) | 524 | 443 | 1,011 | 877 |
Provision for loan losses | 0 | 5 | 0 | (8) |
Noninterest income | 3,267 | 3,062 | 6,386 | 6,047 |
Noninterest expense | 2,905 | 2,829 | 5,901 | 5,567 |
Income before income taxes | 886 | 671 | 1,496 | 1,365 |
Income tax expense (benefit) | 0 | 0 | 0 | 0 |
Net income (loss) | 886 | 671 | 1,496 | 1,365 |
Total assets | 58,156 | 51,239 | 58,156 | 51,239 |
Goodwill | 0 | 0 | 0 | 0 |
Other |  |  |  |  |
Financial information for the Company's operating segments |  |  |  |  |
Net interest income (loss) | (2,437) | (938) | (4,957) | (2,225) |
Provision for loan losses | 0 | 0 | 0 | 0 |
Noninterest income | 142 | 1,072 | (83) | 818 |
Noninterest expense | 152 | 241 | 552 | 370 |
Income before income taxes | (2,447) | (107) | (5,592) | (1,777) |
Income tax expense (benefit) | (957) | (41) | (2,187) | (684) |
Net income (loss) | (1,490) | (66) | (3,405) | (1,093) |
Total assets | 12,633 | 27,247 | 12,633 | 27,247 |
Goodwill | $ 0 | $ 0 | $ 0 | $ 0 |

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