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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

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

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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

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- Definition

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ 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=121645371&loc=d3e27161-111563

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- Definition

Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

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