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Business Combinations - Additional Information (Details) - USD ($)			12 Months Ended
	Feb. 14, 2022	Feb. 22, 2021	Dec. 31, 2021	Jun. 30, 2022	Jul. 28, 2021	Mar. 31, 2021	Sep. 25, 2020
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)			$ 4	$ 4
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	1,750,000			$ 1,500,000
Loans	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 asset fair value	$ 5,920,000
Intangible asset estimated useful life	10 years
Delta Bancshare Company | Fair Value Adjustments
Business Acquisition [Line Items]
Loans	$ (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 asset fair value	5,920,000
Delta Bancshare Company | Acquired Book Value
Business Acquisition [Line Items]
Loans	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 asset fair value	$ 0
LINCO Bancshares, Inc.
Business Acquisition [Line Items]
Percentage of issued and outstanding shares acquired							100.00%
Common stock, par value (in dollars per share)							$ 1.00
Share Price							$ 4.00
Consideration paid in cash		$ 103,500,000
Consideration paid in shares		1,262,246
Dividends paid		$ 13,000,000
Goodwill acquired during period		5,400,000
Pre-tax of acquisition costs		9,000,000				$ 8,500,000
Loans		828,976,000
Accreted to interest income over the remaining term of loans		11,100,000
Elimination of deferred fees and unearned discounts previously recorded by Jefferson Bank		1,700,000
Allowance for credit losses for loans identified as PCD		2,000,000	$ 2,074,000
Purchased credit deteriorated loans			$ 64,647,000
Change in acquired time deposits		990,410,000
Change in FHLB advances		27,916,000
LINCO Bancshares, Inc. | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible asset fair value		$ 2,148,000
Intangible asset estimated useful life		10 years
LINCO Bancshares, Inc. | Fair Value Adjustments
Business Acquisition [Line Items]
Loans		$ (9,401,000)
Change in acquired time deposits		2,081,000
Change in FHLB advances		975,000
LINCO Bancshares, Inc. | Fair Value Adjustments | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible asset fair value		2,025,000
LINCO Bancshares, Inc. | Acquired Book Value
Business Acquisition [Line Items]
Loans		838,377,000
Purchased credit deteriorated loans		64,600,000
Change in acquired time deposits		988,329,000
Change in FHLB advances		26,941,000
LINCO Bancshares, Inc. | Acquired Book Value | Core Deposit Intangibles
Business Acquisition [Line Items]
Intangible asset fair value		$ 123,000

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