| Disaggregation of Revenue | Noninterest income disaggregated by major source for the years ended December 31, 2020, 2019, and 2018 consisted of the following (dollars in thousands): 
|  |  |  |  |  |  |  |  |  |  |  
|  |  | 2020 |  | 2019 |  | 2018 |  
| Noninterest income: |   |  |    |   |  |    |   |  |    |  
| Deposit Service Charges (1): |   |  |    |   |  |    |   |  |    |  
| Overdraft fees |  | $ |  17,792 |  | $ |  24,092 |  | $ |  21,052 |  
| Maintenance fees & other |  |   |  7,459 |  |   |  6,110 |  |   |  4,387 |  
| Other service charges, commissions, and fees (1) |  |   |  6,292 |  |   |  6,423 |  |   |  5,603 |  
| Interchange fees (1) |  |   |  7,184 |  |   |  14,619 |  |   |  18,803 |  
| Fiduciary and asset management fees (1): |  |   |  |  |   |    |  |   |    |  
| Trust asset management fees |  |   |  10,804 |  |   |  9,141 |  |   |  5,536 |  
| Registered advisor management fees |  |   |  8,657 |  |   |  10,107 |  |   |  6,589 |  
| Brokerage management fees |  |   |  4,189 |  |   |  4,117 |  |   |  4,025 |  
| Mortgage banking income |  |   |  25,857 |  |   |  10,303 |  |   |  — |  
| Gains on securities transactions |  |   |  12,294 |  |   |  7,675 |  |   |  383 |  
| Bank owned life insurance income |  |   |  9,554 |  |   |  8,311 |  |   |  7,198 |  
| Loan-related interest rate swap fees |  |   |  15,306 |  |   |  14,126 |  |   |  3,554 |  
| Gain on Shore Premier sale |  |   |  — |  |   |  — |  |   |  19,966 |  
| Other operating income (2)(3) |  |   |  6,098 |  |   |  17,791 |  |   |  7,145 |  
| Total noninterest income (4) |  | $ |  131,486 |  | $ |  132,815 |  | $ |  104,241 |  
| (1) | Income within scope of Topic 606. | 
 
| (2) | Includes income within the scope of Topic 606 of $3.5 million, $4.0 million and $4.4 million for the years ended December 31, 2020, 2019, and 2018, respectively. The remaining balance is outside the scope of Topic 606. | 
 
| (3) | For the year ended December 31, 2019, the remaining balance outside the scope of Topic 606 includes $9.8 million in life insurance proceeds related to a Xenith-acquired loan that had been charged off prior to the Company’s acquisition of Xenith. | 
 
| (4) | Noninterest income for the discontinued mortgage segment is reported in Note 19 “Segment Reporting & Discontinued Operations.” | 
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