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2. Investment Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Investment Securities Available for Sale |  |
Amortized cost | $ 322,530 | $ 238,236
Estimated fair value | 325,517 | 245,249
U.S. Treasuries |  |
Investment Securities Available for Sale |  |
Amortized cost | 7,960 | 0
Gross unrealized gains | 0 | 0
Gross unrealized losses | 0 | 0
Estimated fair value | 7,960 | 0
U.S. Government Sponsored Enterprises |  |
Investment Securities Available for Sale |  |
Amortized cost | 12,939 | 7,384
Gross unrealized gains | 282 | 331
Gross unrealized losses | 202 | 208
Estimated fair value | 13,019 | 7,507
Mortgage-Backed Securities |  |
Investment Securities Available for Sale |  |
Amortized cost | 184,445 | 143,095
Gross unrealized gains | 2,225 | 2,812
Gross unrealized losses | 967 | 593
Estimated fair value | 185,703 | 145,314
State and Political Subdivisions |  |
Investment Securities Available for Sale |  |
Amortized cost | 117,186 | 87,757
Gross unrealized gains | 3,070 | 4,758
Gross unrealized losses | 1,421 | 87
Estimated fair value | 118,835 | 92,428
Total |  |
Investment Securities Available for Sale |  |
Gross unrealized gains | 5,577 | 7,901
Gross unrealized losses | $ 2,590 | $ 888

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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