Acquisition and Preliminary Purchase Price Allocation - Additional Information (Details) - USD ($) $ in Thousands, shares in Millions		3 Months Ended		9 Months Ended
	Mar. 10, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Asset Acquisition [Line Items]
Acquisition of Citizens Commerce Bancshares, Inc.				$ 62,078
Non-impaired loans	$ 246,400
Merger related expenses		$ 2	$ 0	5,647	$ 0
Citizens Commerce Bancshares, Inc.
Asset Acquisition [Line Items]
Stock issued in connection with acquisition (in shares)	0.7
Acquisition of Citizens Commerce Bancshares, Inc.	$ 62,100
Fair value of purchased financial assets with credit deterioration	4,900
Contractual amounts receivable	8,500
Allowance for credit loss	3,600
Premium on time deposits	$ 600
Time deposits amortization period	5 years
Allowance for credit losses acquired	$ 2,000
Merger related expenses				5,600
Professional fees				1,600
Severance costs				1,400
Data processing costs				1,300
Citizens Commerce Bancshares, Inc. | Core Deposits
Asset Acquisition [Line Items]
Core deposit intangible	$ 8,278	8,278	$ 0	$ 8,278	$ 0
Intangible assets amortization period	10 years
(Losses) gains on sale of investment securities, net		$ 41,000
Citizens Commerce Bancshares, Inc. | Citizens Commerce Bancshares, Inc.
Asset Acquisition [Line Items]
Equity ownership positions in the community bank holding companies (percent)	100.00%