Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 01, 2022	Dec. 31, 2021
Accounting Policies [Line Items]
Mortgage loans held for sale are held for an interim period	30 days
Servicing loans previously sold	$ 3,700,000			$ 3,800,000
Loans held for sale	0			$ 0
Advertising and marketing expenses	$ 427,000	$ 404,000
Change in accounting principle, ASU, Adopted [true false]	true
Change in accounting principle, ASU, Adoption date	Jan. 01, 2022
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201602Member
Right-of-use assets	$ 10,700,000		$ 11,000,000.0
Lease liabilities	$ 10,629,000		$ 10,900,000