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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Noninterest Income Disaggregated by Revenue Source | The following table presents our noninterest income disaggregated by revenue source for the three and nine months ended September 30, 2019 and 2018.
| Three Months Ended |  |  |  | Nine Months Ended |  |
(Dollars in thousands) | September 30, 2019 |  | September 30, 2018 |  | September 30, 2019 |  | September 30, 2018
Noninterest income |  |  |  |  |  |  |
Service charges on deposits | $ | 1,025 |  |  | $ | 926 |  |  | $ | 2,802 |  |  | $ | 2,599 |
Loan swap referral fees | 629 |  |  |  | 0 |  |  |  | 629 |  |  |  | 0 |
Trust and investment management income | 1,892 |  |  | 1,668 |  |  | 5,399 |  |  | 5,037 |
Brokerage income | 654 |  |  | 455 |  |  | 1,804 |  |  | 1,514 |
Merchant and bankcard fees (interchange income) | 843 |  |  | 681 |  |  | 2,422 |  |  | 2,047 |
Revenue from contracts with customers | 5,043 |  |  | 3,730 |  |  | 13,056 |  |  | 11,197 |
Other service charges | 265 |  |  | 409 |  |  | 665 |  |  | 1,189 |
Mortgage banking activities | 623 |  |  | 735 |  |  | 1,743 |  |  | 2,049 |
Income from life insurance | 479 |  |  | 533 |  |  | 1,505 |  |  | 1,101 |
Other income | 44 |  |  | 56 |  |  | 188 |  |  | 272 |
Investment securities gains | 2,328 |  |  | 29 |  |  | 4,731 |  |  | 891 |
Total noninterest income | $ | 8,782 |  |  | $ | 5,492 |  |  | $ | 21,888 |  |  | $ | 16,699 |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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