Commitments and Contingencies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) Apartment	Dec. 31, 2019 USD ($)
Other Commitments [Line Items]
Number of apartments under the project | Apartment	37
Limited partner capital contribution commitment	$ 7,579,000
Annual LIHTCs mount awarded for the project	861,000
Total anticipated LIHTCs amount under the housing project	$ 8,613,000
Project investment amortization period	10 years	10 years
Carrying value of investment in limited partnership	$ 146,000	$ 190,000
PPP Loans [Member] | Small Business Administration [Member]
Other Commitments [Line Items]
Nonrefundable loan processing fees received	20,883,000
Other Assets [Member]
Other Commitments [Line Items]
Carrying value of investment in limited partnership	$ 6,682,000	$ 7,249,000