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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606 for the year ended December 31:
| 2019 |  | 2018 |  | 2017
| (dollars in thousands)
Noninterest Income |  |  |  |  |
In-scope of Topic 606: |  |  |  |  |
Trust income | $ | 8,321 |  |  | $ | 7,901 |  |  | $ | 7,098 |
Service charges on deposit accounts | 18,926 |  |  | 18,175 |  |  | 18,579 |
Insurance and retail brokerage commissions | 7,583 |  |  | 7,426 |  |  | 8,807 |
Card-related interchange income | 21,677 |  |  | 20,187 |  |  | 18,780 |
Gain on sale of other loans and assets | 1,062 |  |  | 982 |  |  | 1,005 |
Other income | 3,837 |  |  | 3,708 |  |  | 4,328 |
Noninterest Income (in-scope of Topic 606) | 61,406 |  |  | 58,379 |  |  | 58,597 |
Noninterest Income (out-of-scope of Topic 606) | 24,079 |  |  | 30,258 |  |  | 21,734 |
Total Noninterest Income | $ | 85,485 |  |  | $ | 88,637 |  |  | $ | 80,331 |

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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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