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Securities - Securities Sold (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | $ 199,532,000 | $ 8,742,000 | $ 212,137,000
Net Proceeds | $ 0 | 199,875,000 | 8,773,000 | 212,485,000
Gain/(Loss) | $ 0 | 343,000 | 31,000 | 348,000
Obligations of states and political subdivisions |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 1,112,000 | 2,696,000 | 11,799,000
Net Proceeds |  | 1,111,000 | 2,561,000 | 11,813,000
Gain/(Loss) |  | (1,000) | (135,000) | 14,000
Residential mortgage backed securities: | Government agency mortgage backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 70,926,000 | 6,046,000 | 72,556,000
Net Proceeds |  | 70,322,000 | 6,212,000 | 71,944,000
Gain/(Loss) |  | (604,000) | $ 166,000 | (612,000)
Residential mortgage backed securities: | Government agency collateralized mortgage obligations |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 122,404,000 |  | 122,692,000
Net Proceeds |  | 120,606,000 |  | 120,892,000
Gain/(Loss) |  | (1,798,000) |  | (1,800,000)
Commercial mortgage backed securities: | Government agency mortgage backed securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 4,838,000 |  | 4,838,000
Net Proceeds |  | 4,720,000 |  | 4,720,000
Gain/(Loss) |  | (118,000) |  | (118,000)
Other debt securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 252,000 |  | 252,000
Net Proceeds |  | 257,000 |  | 257,000
Gain/(Loss) |  | 5,000 |  | 5,000
Other equity securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Carrying Value |  | 0 |  | 0
Net Proceeds |  | 2,859,000 |  | 2,859,000
Gain/(Loss) |  | $ 2,859,000 |  | $ 2,859,000

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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=121645371&loc=d3e27357-111563 + Details
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