Securities - Securities with Unrealized Losses Aggregated by Investment Category and Time with Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	$ 29,937	$ 153,118
Less than 12 months, unrealized losses	1,658	15,751
More than 12 months, fair value	503,911	375,245
More than 12 months, unrealized losses	79,717	73,290
Total, fair value	533,848	528,363
Total, unrealized losses	81,375	89,041
U.S. Treasury Notes and Bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	79,975	78,204
More than 12 months, unrealized losses	10,720	12,606
Total, fair value	79,975	78,204
Total, unrealized losses	10,720	12,606
State and Municipal [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	2,481	89,158
Less than 12 months, unrealized losses	25	12,612
More than 12 months, fair value	233,517	140,390
More than 12 months, unrealized losses	44,616	34,939
Total, fair value	235,998	229,548
Total, unrealized losses	44,641	47,551
Mortgage-backed [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	26,955	63,249
Less than 12 months, unrealized losses	1,626	3,093
More than 12 months, fair value	178,182	144,318
More than 12 months, unrealized losses	23,822	25,047
Total, fair value	205,137	207,567
Total, unrealized losses	25,448	28,140
Corporate [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	501	711
Less than 12 months, unrealized losses	7	46
More than 12 months, fair value	215	0
More than 12 months, unrealized losses	35	0
Total, fair value	716	711
Total, unrealized losses	42	46
Asset-backed Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, unrealized losses	0	0
More than 12 months, fair value	12,022	12,333
More than 12 months, unrealized losses	524	698
Total, fair value	12,022	12,333
Total, unrealized losses	$ 524	$ 698

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 5
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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