Securities - Restricted Stocks and others (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	[1]
Securities
Investment in restricted stock	$ 3,210,000
Investment in restricted stocks	3,209,000	$ 3,257,000
Restricted stocks, other-than-temporary impairment	$ 0

[1] Derived from audited consolidated financial statements.