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Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Non-interest Income |  |  |  |  |  |  |  |  |  |  |
Service charges on deposit accounts |  |  |  |  |  |  |  |  | $ 5,759 | $ 4,809 | $ 4,297
Wealth and asset management fees |  |  |  |  |  |  |  |  | 4,172 | 3,724 | 3,087
Mortgage banking |  |  |  |  |  |  |  |  | 1,019 | 906 | 1,095
Card processing and interchange income |  |  |  |  |  |  |  |  | 4,261 | 3,763 | 3,396
Net realized gains on available-for-sale securities |  |  |  |  |  |  |  |  | 0 | 1,543 | 1,005
Other income |  |  |  |  |  |  |  |  | 5,512 | 6,690 |
Total non-interest income | $ 4,433 | $ 5,933 | $ 5,606 | $ 4,751 | $ 5,541 | $ 5,032 | $ 5,089 | $ 5,773 | $ 20,723 | $ 21,435 | $ 17,691

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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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- Definition Amount of fees and commissions from banking, advisory, brokerage, and securities underwriting activities. Activities include, but are not limited to, underwriting securities, private placements of securities, investment advisory and management services, merger and acquisition services, sale and servicing of mutual funds, and other related consulting fees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(b)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 + Details
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