Securities, Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available-for-sale [Abstract]
Amortized cost	$ 1,301,244	$ 1,430,605
Gross unrealized gains	245	245
Gross unrealized losses	(137,765)	(174,624)
Fair value	1,163,724	1,256,226
U.S. Treasury and Government Agencies [Member]
Available-for-sale [Abstract]
Amortized cost	381,268	418,579
Gross unrealized gains	121	212
Gross unrealized losses	(26,572)	(36,859)
Fair value	354,817	381,932
State and Political Subdivisions [Member]
Available-for-sale [Abstract]
Amortized cost	313,147	326,746
Gross unrealized gains	88	32
Gross unrealized losses	(48,290)	(61,676)
Fair value	264,945	265,102
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	518,836	593,917
Gross unrealized gains	36	1
Gross unrealized losses	(62,136)	(73,833)
Fair value	456,736	520,085
Asset-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	87,993	91,363
Gross unrealized gains	0	0
Gross unrealized losses	(767)	(2,256)
Fair value	$ 87,226	$ 89,107

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
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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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
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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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
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Name Accounting Standards Codification
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