Revenue Recognition (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue Recognition [Abstract]
U.S. government securities portfolio	$ 3.9
Stock borrow / stock loan	3,442,000	$ 3,578,000
Gross revenue from stock borrow/ Stock loan	9,776,000	7,465,000
Expenses from stock borrow/stock loan	$ 6,334,000	$ 3,887,000