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Securities - Securities Sold (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | $ 212,137 | $ 2,403 | $ 495,192
Net Proceeds | 212,485 | 2,387 | 495,340
Gain/(Loss) | 348 | (16) | 148
Obligations of other U.S. Government agencies and corporations |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value |  |  | 11,088
Net Proceeds |  |  | 10,974
Gain/(Loss) |  |  | (114)
Obligations of states and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 11,799 | 901 | 110,019
Net Proceeds | 11,813 | 893 | 112,199
Gain/(Loss) | 14 | (8) | 2,180
Trust preferred securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value |  |  | 9,346
Net Proceeds |  |  | 9,403
Gain/(Loss) |  |  | 57
Other debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 252 |  | 7,269
Net Proceeds | 257 |  | 7,395
Gain/(Loss) | 5 |  | 126
Other equity securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 0 |  |
Net Proceeds | 2,859 |  |
Gain/(Loss) | 2,859 |  |
Government agency mortgage backed securities | Residential mortgage backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 72,556 | 943 | 264,924
Net Proceeds | 71,944 | 942 | 263,217
Gain/(Loss) | (612) | (1) | (1,707)
Government agency mortgage backed securities | Commercial mortgage backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 4,838 |  | 14,104
Net Proceeds | 4,720 |  | 14,082
Gain/(Loss) | (118) |  | (22)
Government agency collateralized mortgage obligations | Residential mortgage backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value | 122,692 | 559 | 72,153
Net Proceeds | 120,892 | 552 | 71,781
Gain/(Loss) | $ (1,800) | $ (7) | (372)
Government agency collateralized mortgage obligations | Commercial mortgage backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Carrying Value |  |  | 6,289
Net Proceeds |  |  | 6,289
Gain/(Loss) |  |  | $ 0

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563 + Details
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