Loans and Allowance for Credit Losses - Troubled Debt Restructurings, Excluding Loans Acquired, Segregated by Class of Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 loan	Sep. 30, 2022 loan	Sep. 30, 2023 loan	Sep. 30, 2022 loan	Dec. 31, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications		3		4
Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					37
Troubled debt, balance | $					$ 3,471
Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					24
Troubled debt, balance | $					$ 1,849
Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					13
Troubled debt, balance | $					$ 1,622
Real Estate | Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					36
Troubled debt, balance | $					$ 3,438
Real Estate | Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					24
Troubled debt, balance | $					$ 1,849
Real Estate | Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					12
Troubled debt, balance | $					$ 1,589
Real Estate | Single family residential | Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					36
Troubled debt, balance | $					$ 3,438
Real Estate | Single family residential | Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					24
Troubled debt, balance | $					$ 1,849
Real Estate | Single family residential | Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					12
Troubled debt, balance | $					$ 1,589
Real Estate | Other commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications		3		4
Real Estate | Other commercial | Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					0
Troubled debt, balance | $					$ 0
Real Estate | Other commercial | Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					0
Troubled debt, balance | $					$ 0
Real Estate | Other commercial | Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					0
Troubled debt, balance | $					$ 0
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications	1		1
Commercial | Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					1
Troubled debt, balance | $					$ 33
Commercial | Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					0
Troubled debt, balance | $					$ 0
Commercial | Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					1
Troubled debt, balance | $					$ 33
Commercial | Commercial | Loans, Excluding Acquired Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					1
Troubled debt, balance | $					$ 33
Commercial | Commercial | Loans, Excluding Acquired Loans | Accruing TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					0
Troubled debt, balance | $					$ 0
Commercial | Commercial | Loans, Excluding Acquired Loans | Nonaccrual TDR Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loan modifications					1
Troubled debt, balance | $					$ 33