Securities, Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Available-for-sale, amortized cost [Abstract]
Due in one year or less	$ 23,805
Due after one through five years	372,557
Due after five through ten years	129,061
Due after ten years	175,456
Amortized cost	1,324,139	$ 1,430,605
Available for sale, fair value [Abstract]
Due in one year or less	23,585
Due after one through five years	335,324
Due after five through ten years	106,680
Due after ten years	130,228
Fair value	1,135,878	1,256,226
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale, amortized cost [Abstract]
Without single maturity date	534,442
Amortized cost	534,442	593,917
Available for sale, fair value [Abstract]
Without single maturity date	452,298
Fair value	452,298	520,085
Asset-backed Securities [Member]
Available-for-sale, amortized cost [Abstract]
Without single maturity date	88,818
Amortized cost	88,818	91,363
Available for sale, fair value [Abstract]
Without single maturity date	87,763
Fair value	$ 87,763	$ 89,107

Amortized cost of 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 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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+ References

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