Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Line Items]
Federal Home Loan Bank Stock, redemption period, years after membership termination	5 years
Investment in real estate limited partnerships, ownership percentage	99.90%
Investment in real estate limited partnerships, number of investments	3
Premises and Improvements [Member] | Minimum [Member]
Accounting Policies [Line Items]
Estimated useful life (in years)	5 years
Premises and Improvements [Member] | Maximum [Member]
Accounting Policies [Line Items]
Estimated useful life (in years)	40 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Accounting Policies [Line Items]
Estimated useful life (in years)	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Accounting Policies [Line Items]
Estimated useful life (in years)	20 years