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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Noninterest Income Disaggregated by Major Source | Noninterest income disaggregated by major source, for the years ended December 31, 2018, 2017 and 2016, consisted of the following:
| December 31,
| 2018 |  | 2017 |  | 2016
| (dollar in thousands)
Noninterest income: |  |  |  |  |
Income from fiduciary activities(1): |  |  |  |  |
Trust asset management fees | $ | 1,360 |  |  | $ | 1,238 |  |  | $ | 1,356 |
Service charges on deposit accounts(1): |  |  |  |  |
Overdrawn account fees | 995 |  |  | 999 |  |  | 1,003 |
Monthly and other service charges | 223 |  |  | 224 |  |  | 224 |
Other service charges and fees: |  |  |  |  |
Interchange fees (1) | 361 |  |  | 331 |  |  | 296 |
ATM fees (1) | 2,240 |  |  | 2,046 |  |  | 2,056 |
Brokerage commissions (1) | 831 |  |  | 865 |  |  | 744 |
Other charges and fees (2) | 741 |  |  | 636 |  |  | 617 |
(Loss) on the sale and disposal of bank premises and equipment (1) | (3 | ) |  | (12 | ) |  | (10 | )
Gain (loss) on sale of securities | 17 |  |  | (10 | ) |  | 98 |
Other operating income (3) | 114 |  |  | 463 |  |  | 285 |
Total noninterest income | $ | 6,879 |  |  | $ | 6,780 |  |  | $ | 6,669 |
(1) Income within the scope of Topic 606. (2) Includes income within the scope of Topic 606 of $671 thousand, $583 thousand, and $565 thousand for the years ended December 31, 2018, 2017, and 2016, respectively. The remaining balance is outside the scope of Topic 606. (3) Includes income within the scope of Topic 606 of $153 thousand, $190 thousand, and $159 thousand for the years ended December 31, 2018 2017, and 2016, respectively. The remaining balance is outside the scope of Topic 606.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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