Business Combinations - Additional Information (Details) - USD ($)			12 Months Ended
	Mar. 20, 2023	Feb. 14, 2022	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)			$ 4	$ 4
Intangible asset estimated useful life			15 years
Delta Bancshare Company
Business Acquisition [Line Items]
Percentage of issued and outstanding shares acquired		100.00%
Common stock, par value (in dollars per share)		$ 10.00
Share Price		$ 4.00
Consideration paid in cash		$ 15,150,000
Consideration paid in shares		2,292,270
Goodwill acquired during period		$ 28,600,000
Pre-tax of acquisition costs			$ 2,500,000
Pre-tax of acquisition costs				$ 2,200,000
Loans, net		418,509,000
Accreted to interest income over the remaining term of loans		8,200,000
Elimination of deferred fees and unearned discounts previously recorded by Jefferson Bank			300,000
Allowance for credit losses for loans identified as PCD		863,000
Change in acquired time deposits		560,378,000
Change in FHLB advances		45,075,000
Delta Bancshare Company | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible assets fair value		$ 5,920,000
Intangible asset estimated useful life		10 years
Delta Bancshare Company | Fair Value Adjustments
Business Acquisition [Line Items]
Loans, net		$ (7,924,000)
Change in acquired time deposits		1,759,000
Change in FHLB advances		75,000
Delta Bancshare Company | Fair Value Adjustments | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible assets fair value		5,920,000
Delta Bancshare Company | Acquired Book Value
Business Acquisition [Line Items]
Loans, net		426,433,000
Purchased credit deteriorated loans		18,800,000
Change in acquired time deposits		558,619,000
Change in FHLB advances		45,000,000
Delta Bancshare Company | Acquired Book Value | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible assets fair value		$ 0
Blackhawk Bancorp, Inc
Business Acquisition [Line Items]
Conversion of Stock, Shares Issued	1.15
Percentage of issued and outstanding shares acquired	100.00%
Common stock, par value (in dollars per share)	$ 0.01
Share Price	$ 4
Consideration paid in cash	$ 1,928
Consideration paid in shares	3,290,222
Goodwill acquired during period	$ 50,100,000
Pre-tax of acquisition costs			$ 8,200,000	$ 0
Allowance for credit losses for loans identified as PCD	3,791,000
Purchased credit deteriorated loans	105,983,000
Blackhawk Bancorp, Inc | ASU 2016-13
Business Acquisition [Line Items]
Allowance for credit losses	3,800,000
Allowance for credit losses on non-PCD loans	$ 618,330,000
Blackhawk Bancorp, Inc | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible asset estimated useful life	10 years
Blackhawk Bancorp, Inc | Fair Value Adjustments
Business Acquisition [Line Items]
Loans, net	$ 722,866,000
Change in acquired time deposits	$ 1,194,972,000