Regulatory Capital - Narrative (Details)	Sep. 30, 2022	Dec. 31, 2021
Mutual Holding Company Reorganization and Regulatory Matters
Percentage of minimum Tier 1 capital to risk based assets	0.0600	0.0600
Percentage of risk weight	150.00%
Minimum
Mutual Holding Company Reorganization and Regulatory Matters
Percentage of minimum Tier 1 capital to risk based assets	0.04
Percentage of capital conservation buffer	0.625%
Maximum
Mutual Holding Company Reorganization and Regulatory Matters
Percentage of minimum Tier 1 capital to risk based assets	0.06
Percentage of capital conservation buffer	2.50%