Segment Operating Results - (Footnotes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Other Revenue, net	$ (4,825)	$ (2,882)	$ (38,151)	$ 11,873
Special Charges, Including Business Realignment Costs	0	8,554	532	8,554
Acquisition and Transition Costs	0	0	0	7
Total Other Expenses	0	8,554	532	8,561
Investment Banking [Member]
Segment Reporting Information [Line Items]
Other Revenue, net	(5,603)	(2,559)	(40,066)	11,258
Interest expense on Notes Payable and Line of Credit	4,188	4,393	12,696	13,269
Special Charges, Including Business Realignment Costs	0	0	532	0
Acquisition and Transition Costs	0	0	0	7
Total Other Expenses	0	0	532	7
Investment Management [Member]
Segment Reporting Information [Line Items]
Other Revenue, net	778	(323)	1,915	615
Special Charges, Including Business Realignment Costs	0	8,554	0	8,554
Total Other Expenses	$ 0	$ 8,554	$ 0	$ 8,554