Investments, Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities [Abstract]
Amortized cost	$ 469,888	$ 486,993
Gross unrealized gains	243	50
Gross unrealized losses	(52,324)	(47,537)
Fair value	417,807	439,506
U.S. Agency Securities [Member]
Debt Securities [Abstract]
Amortized cost	71,567	78,556
Gross unrealized gains	0	0
Gross unrealized losses	(7,920)	(7,879)
Fair value	63,647	70,677
U.S. Treasury Securities [Member]
Debt Securities [Abstract]
Amortized cost	160,426	162,236
Gross unrealized gains	0	0
Gross unrealized losses	(12,995)	(13,666)
Fair value	147,431	148,570
Obligations of State and Political Subdivisions [Member]
Debt Securities [Abstract]
Amortized cost	108,569	120,562
Gross unrealized gains	5	35
Gross unrealized losses	(12,552)	(10,297)
Fair value	96,022	110,300
Corporate Obligations [Member]
Debt Securities [Abstract]
Amortized cost	13,381	10,335
Gross unrealized gains	229	0
Gross unrealized losses	(1,490)	(952)
Fair value	12,120	9,383
Mortgage-backed Securities in Government Sponsored Entities [Member]
Debt Securities [Abstract]
Amortized cost	115,945	115,304
Gross unrealized gains	9	15
Gross unrealized losses	(17,367)	(14,743)
Fair value	$ 98,587	$ 100,576

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
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Amount, before tax, of unrealized loss 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://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
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Amortized cost of 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/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
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