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SEGMENT INFORMATION (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
Information about reportable segments |  |  |  |  |
Net interest income | $ 78,029 | $ 68,306 | $ 145,303 | $ 135,187 |
Provision for loan losses | 1,461 | 2,305 | 3,289 | 3,646 |
Noninterest revenues | 51,226 | 38,772 | 95,544 | 77,053 |
Amortization of intangible assets | 4,263 | 1,403 | 7,031 | 2,845 |
Acquisition expenses | 22,896 | 263 | 24,612 | 340 |
Other operating expenses | 75,720 | 64,690 | 144,811 | 130,840 |
Income before income taxes | 24,915 | 38,417 | 61,104 | 74,569 |
Assets | 10,884,046 | 8,742,111 | 10,884,046 | 8,742,111 | $ 8,666,437
Goodwill | 733,604 | 465,142 | 733,604 | 465,142 | $ 465,142
Eliminations [Member] |  |  |  |  |
Information about reportable segments |  |  |  |  |
Net interest income | 0 | 0 | 0 | 0 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Noninterest revenues | (687) | (595) | (1,351) | (1,161) |
Amortization of intangible assets | 0 | 0 | 0 | 0 |
Acquisition expenses | 0 | 0 | 0 | 0 |
Other operating expenses | (687) | (595) | (1,351) | (1,161) |
Income before income taxes | 0 | 0 | 0 | 0 |
Assets | (43,533) | (36,977) | (43,533) | (36,977) |
Goodwill | 0 | 0 | 0 | 0 |
Banking [Member] | Operating Segments [Member] |  |  |  |  |
Information about reportable segments |  |  |  |  |
Net interest income | 77,872 | 68,220 | 145,006 | 135,019 |
Provision for loan losses | 1,461 | 2,305 | 3,289 | 3,646 |
Noninterest revenues | 18,062 | 16,594 | 33,929 | 31,907 |
Amortization of intangible assets | 1,170 | 691 | 1,724 | 1,410 |
Acquisition expenses | 22,729 | 31 | 23,250 | 99 |
Other operating expenses | 53,890 | 47,584 | 103,383 | 96,046 |
Income before income taxes | 16,684 | 34,203 | 47,289 | 65,725 |
Assets | 10,635,177 | 8,675,329 | 10,635,177 | 8,675,329 |
Goodwill | 631,148 | 440,870 | 631,148 | 440,870 |
Employee Benefit Services [Member] | Operating Segments [Member] |  |  |  |  |
Information about reportable segments |  |  |  |  |
Net interest income | 94 | 38 | 172 | 77 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Noninterest revenues | 21,118 | 12,067 | 38,754 | 24,457 |
Amortization of intangible assets | 2,343 | 114 | 3,933 | 230 |
Acquisition expenses | 117 | 0 | 1,179 | 0 |
Other operating expenses | 13,068 | 9,432 | 24,438 | 18,879 |
Income before income taxes | 5,684 | 2,559 | 9,376 | 5,425 |
Assets | 217,020 | 34,814 | 217,020 | 34,814 |
Goodwill | 84,552 | 8,018 | 84,552 | 8,018 |
All Other [Member] |  |  |  |  |
Information about reportable segments |  |  |  |  |
Net interest income | 63 | 48 | 125 | 91 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Noninterest revenues | 12,733 | 10,706 | 24,212 | 21,850 |
Amortization of intangible assets | 750 | 598 | 1,374 | 1,205 |
Acquisition expenses | 50 | 232 | 183 | 241 |
Other operating expenses | 9,449 | 8,269 | 18,341 | 17,076 |
Income before income taxes | 2,547 | 1,655 | 4,439 | 3,419 |
Assets | 75,382 | 68,945 | 75,382 | 68,945 |
Goodwill | $ 17,904 | $ 16,254 | $ 17,904 | $ 16,254 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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