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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangibles | $ 45,369 |  |  |  |  |  |  |  | $ 45,154 |  |  |  | $ 45,369 | $ 45,154 |
Total assets | 2,159,069 |  |  |  |  |  |  |  | 1,966,113 |  |  |  | 2,159,069 | 1,966,113 |
Net interest income | 19,067 |  | $ 18,675 |  | $ 18,373 |  | $ 17,531 |  | 17,291 | $ 17,193 | $ 16,889 | $ 16,747 | 73,646 | 68,120 | $ 49,737
Provision for loan losses |  |  |  |  |  |  |  |  |  |  |  |  | 3,350 | 3,870 | 3,510
Service fees, security gains and other noninterest income | 6,051 |  | 6,058 |  | 6,055 |  | 5,887 |  | 6,076 | 6,485 | 5,737 | 4,946 | 24,051 | 23,244 | 18,306
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 58,477 | 56,321 | 51,521
Amortization and depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 3,090 | 3,131 | 2,458
INCOME BEFORE INCOME TAXES | 9,319 |  | 7,992 |  | 7,714 |  | 7,755 |  | 7,377 | 7,343 | 6,853 | 6,469 | 32,780 | 28,042 | 10,554
Income tax | 4,084 | [1] | 2,009 | [1] | 2,004 | [1] | 1,972 | [1] | 2,014 | 1,967 | 1,833 | 1,671 | 10,069 | 7,485 | 2,499
NET INCOME | 5,235 |  | $ 5,983 |  | $ 5,710 |  | $ 5,783 |  | 5,363 | $ 5,376 | $ 5,020 | $ 4,798 | 22,711 | 20,557 | 8,055
Eliminations And Others |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangibles | (822) |  |  |  |  |  |  |  | (646) |  |  |  | (822) | (646) |
Total assets | 3,935 |  |  |  |  |  |  |  | 2,805 |  |  |  | 3,935 | 2,805 |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | (81) | (88) | (33)
Provision for loan losses |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Service fees, security gains and other noninterest income |  |  |  |  |  |  |  |  |  |  |  |  | (340) | (278) | (255)
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 1,029 | 1,319 | 4,562
Amortization and depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
INCOME BEFORE INCOME TAXES |  |  |  |  |  |  |  |  |  |  |  |  | (1,450) | (1,685) | (4,850)
Income tax |  |  |  |  |  |  |  |  |  |  |  |  | (872) | (670) | (991)
NET INCOME |  |  |  |  |  |  |  |  |  |  |  |  | (578) | (1,015) | (3,859)
Trust Segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangibles | 4,426 |  |  |  |  |  |  |  | 4,681 |  |  |  | 4,426 | 4,681 |
Total assets | 11,261 |  |  |  |  |  |  |  | 10,980 |  |  |  | 11,261 | 10,980 |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | 109 | 95 | 65
Provision for loan losses |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Service fees, security gains and other noninterest income |  |  |  |  |  |  |  |  |  |  |  |  | 6,548 | 6,341 | 6,239
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 4,801 | 4,818 | 4,719
Amortization and depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 277 | 305 | 339
INCOME BEFORE INCOME TAXES |  |  |  |  |  |  |  |  |  |  |  |  | 1,579 | 1,313 | 1,246
Income tax |  |  |  |  |  |  |  |  |  |  |  |  | 455 | 462 | 425
NET INCOME |  |  |  |  |  |  |  |  |  |  |  |  | 1,124 | 851 | 821
Bank Segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangibles | 39,120 |  |  |  |  |  |  |  | 38,235 |  |  |  | 39,120 | 38,235 |
Total assets | 2,140,508 |  |  |  |  |  |  |  | 1,948,800 |  |  |  | 2,140,508 | 1,948,800 |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | 73,618 | 68,113 | 49,705
Provision for loan losses |  |  |  |  |  |  |  |  |  |  |  |  | 3,350 | 3,870 | 3,510
Service fees, security gains and other noninterest income |  |  |  |  |  |  |  |  |  |  |  |  | 15,986 | 15,191 | 10,192
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 51,284 | 48,804 | 40,753
Amortization and depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 2,558 | 2,519 | 1,759
INCOME BEFORE INCOME TAXES |  |  |  |  |  |  |  |  |  |  |  |  | 32,412 | 28,111 | 13,875
Income tax |  |  |  |  |  |  |  |  |  |  |  |  | 10,509 | 7,586 | 2,968
NET INCOME |  |  |  |  |  |  |  |  |  |  |  |  | 21,903 | 20,525 | 10,907
Retirement Consulting Segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangibles | 2,645 |  |  |  |  |  |  |  | 2,884 |  |  |  | 2,645 | 2,884 |
Total assets | $ 3,365 |  |  |  |  |  |  |  | $ 3,528 |  |  |  | 3,365 | 3,528 |
Net interest income |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Service fees, security gains and other noninterest income |  |  |  |  |  |  |  |  |  |  |  |  | 1,857 | 1,990 | 2,130
Noninterest expense |  |  |  |  |  |  |  |  |  |  |  |  | 1,363 | 1,380 | 1,487
Amortization and depreciation expense |  |  |  |  |  |  |  |  |  |  |  |  | 255 | 307 | 360
INCOME BEFORE INCOME TAXES |  |  |  |  |  |  |  |  |  |  |  |  | 239 | 303 | 283
Income tax |  |  |  |  |  |  |  |  |  |  |  |  | (23) | 107 | 97
NET INCOME |  |  |  |  |  |  |  |  |  |  |  |  | $ 262 | $ 196 | $ 186
[1] | Income tax expense for the fourth quarter was elevated due to the additional $1.8 million of tax expense from the re-measurement of the Company’s net deferred tax asset.

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