Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) Branch	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Branch	Jun. 30, 2021 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
Accounting Policies [Abstract]
Number of branch offices | Branch	14		14
Mortgage loans held for sale are held for an interim period			30 days
Servicing loans previously sold	$ 9,200,000		$ 9,200,000			$ 8,700,000
Loans held for sale	0		0			$ 0
Advertising and marketing expenses	$ 467,000	$ 406,000	$ 894,000	$ 810,000
Change in accounting principle, ASU, Adopted [true false]	true		true
Change in accounting principle, ASU, Adoption date	Jan. 01, 2022		Jan. 01, 2022
Accounting Standards Update [Extensible Enumeration]			us-gaap:AccountingStandardsUpdate201602Member
Right-of-use assets	$ 12,600,000		$ 12,600,000		$ 11,000,000.0
Lease liabilities	$ 12,650,000		$ 12,650,000		$ 10,900,000