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Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Investment securities available-for-sale |  |
Amortized Cost | $ 344,604 | $ 307,764
Unrealized Gains | 9,712 | 3,061
Unrealized Losses | (167) | (475)
Fair Value | 354,149 | 310,350
U. S. Treasury and agencies |  |
Investment securities available-for-sale |  |
Amortized Cost | 16,538 | 21,246
Unrealized Gains | 93 | 9
Unrealized Losses | (4) | (15)
Fair Value | 16,627 | 21,240
Obligations of state and political agencies |  |
Investment securities available-for-sale |  |
Amortized Cost | 67,921 | 68,162
Unrealized Gains | 1,212 | 647
Unrealized Losses | (27) | (161)
Fair Value | 69,106 | 68,648
Mortgage backed securities - Residential Agency |  |
Investment securities available-for-sale |  |
Amortized Cost | 221,844 | 180,411
Unrealized Gains | 7,483 | 2,258
Unrealized Losses | (18) | (131)
Fair Value | 229,309 | 182,538
Mortgage backed securities - Commercial |  |
Investment securities available-for-sale |  |
Amortized Cost | 29,128 | 30,752
Unrealized Gains | 899 | 101
Unrealized Losses | (117) | (168)
Fair Value | 29,910 | 30,685
Asset backed securities |  |
Investment securities available-for-sale |  |
Amortized Cost | 134 | 139
Unrealized Gains | 7 | 5
Fair Value | 141 | 144
Corporate bonds |  |
Investment securities available-for-sale |  |
Amortized Cost | 9,039 | 7,054
Unrealized Gains | 18 | 41
Unrealized Losses | (1) |
Fair Value | $ 9,056 | $ 7,095

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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