Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments (Unrealized and realized gains and losses recognized in net income on equity securities ) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Investment Securities, Equity Securities with Readily Determinable Fair Values and Other Investments
Equity Securities	$ 5,351,000		$ 5,351,000		$ 6,079,000
Summary of unrealized and realized gains and losses recognized in net income on equity securities
Net gains (losses) recognized during the period on equity securities	(230,000)	$ (5,000)	(728,000)	$ (70,000)
Unrealized gain on equity securities with readily determinable fair values	$ (230,000)	$ (5,000)	$ (728,000)	$ (70,000)