Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent	Treasury Stock [Member]
Balance, beginning of period at Dec. 31, 2022			$ 685,000	$ 16,749	$ 1,928,069	$ 3,169,095	$ (117,960)	$ (352,482)
Net income	$ 157,539					157,539
Unit amortization, net of forfeitures					39,781
Dividends declared, Common						(43,728)
Dividends declared, Preferred						(9,320)
Distributions under employee plans					(137,220)	(63,773)		124,015
Issuance of preferred stock			0
Unrealized gains/(losses) on securities, net of tax	22,710	[1],[2]					22,710
Foreign currency translation adjustment, net of tax	3,429	[1]					3,429
Other					7	2
Common stock repurchased	(94,500)							(94,521)
Balance, end of period at Mar. 31, 2023	5,327,392		685,000	16,749	1,830,637	3,209,815	(91,821)	(322,988)
Balance, beginning of period at Dec. 31, 2023	5,294,431		685,000	16,749	1,905,097	3,398,610	(74,326)	(636,699)
Net income	163,575					163,575
Unit amortization, net of forfeitures					42,157
Dividends declared, Common						(48,608)
Dividends declared, Preferred						(9,320)
Distributions under employee plans					(141,805)	(89,960)		133,314
Issuance of preferred stock			0
Unrealized gains/(losses) on securities, net of tax	(8,204)	[1],[2]					(8,204)
Foreign currency translation adjustment, net of tax	(1,644)	[1]					(1,644)
Other					268	447
Common stock repurchased	(60,700)							(60,710)
Balance, end of period at Mar. 31, 2024	$ 5,273,941		$ 685,000	$ 16,749	$ 1,805,717	$ 3,414,744	$ (84,174)	$ (564,095)

[1] Net of a tax benefit of $3.3 million and tax expense of $8.7 million for the three months ended March 31, 2024 and 2023, respectively.

[2] There were no reclassifications to earnings for the three months ended March 31, 2024. Net of reclassifications to earnings of realized losses of $5.6 million for the three months ended March 31, 2023.