Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Commissions		$ 673,597	$ 710,589	$ 809,500
Principal transactions		490,440	529,033	581,164
Investment banking		731,255	971,485	1,565,381
Asset management		1,299,496	1,262,919	1,206,516
Interest		1,955,745	1,099,115	548,400
Other income		8,747	19,685	72,125
Total revenues		5,159,280	4,592,826	4,783,086
Interest expense		810,336	201,387	45,998
Net revenues	[1]	4,348,944	4,391,439	4,737,088
Non-interest expenses:
Compensation and benefits		2,554,581	2,586,232	2,820,301
Occupancy and equipment rental		339,322	313,247	290,243
Communications and office supplies		184,652	175,135	165,490
Commissions and floor brokerage		58,344	57,752	59,681
Provision for credit losses		24,999	33,506	(11,502)
Other operating expenses		480,354	340,451	345,794
Total non-interest expenses		3,642,252	3,506,323	3,670,007
Income before income tax expense		706,692	885,116	1,067,081
Provision for income taxes		184,156	222,961	242,223
Net income		522,536	662,155	824,858
Preferred dividends		37,281	37,281	35,587
Net income available to common shareholders		$ 485,255	$ 624,874	$ 789,271
Earnings per common share:
Basic		$ 4.55	$ 5.74	$ 7.34
Diluted		4.28	5.32	6.66
Cash dividends declared per common share		$ 1.44	$ 1.2	$ 0.6
Weighted-average number of common shares outstanding:
Basic		106,661	108,848	107,536
Diluted		113,453	117,540	118,530

[1] No individual client accounted for more than 10 percent of total net revenues for the years ended December 31, 2023, 2022, and 2021.