Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment Revision of Prior Period, Adjustment	[4]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest	Parent [Member]
Balance, beginning of year at Dec. 31, 2019			$ 310,000	$ 16,749	$ 1,903,703	$ 1,715,704			$ (11,705)	$ (319,660)	$ 54,999
Net income	$ 503,472					503,472
Unit amortization, net of forfeitures					118,229
Distributions under employee plans					(126,514)	(49,427)				70,182
Dividends declared, Common						(56,967)
Dividends declared, Preferred						(27,261)
Issuance of preferred stock			225,000		(7,005)
Dividends declared to equity-award holders					350
Unrealized gains/(losses) on securities, net of tax	33,133	[1],[2]							33,133
Unrealized losses on cash flow hedging activities, net of tax									(651)
Foreign currency translation adjustment, net of tax	6,862	[1],[3]							6,862
Other					219	386
Deconsolidation of non-controlling interest											(54,999)
Common stock repurchased										(58,261)
Balance, end of year at Dec. 31, 2020	4,238,766		535,000	16,749	1,888,982	2,078,135	$ (7,772)		27,639	(307,739)	0	$ 4,238,766
Net income	824,858					824,858
Unit amortization, net of forfeitures					127,458
Distributions under employee plans					(120,158)	(35,233)				74,568
Dividends declared, Common						(74,437)
Dividends declared, Preferred						(35,587)
Issuance of preferred stock			300,000		(9,112)
Common stock issued for acquisitions					35,186					54,814
Redemption of preferred stock			(150,000)
Unrealized gains/(losses) on securities, net of tax	(19,385)	[1],[2]							(19,385)
Foreign currency translation adjustment, net of tax	(3,536)	[1],[3]							(3,536)
Other					26	(528)
Common stock repurchased	(172,700)									(172,741)
Balance, end of year at Dec. 31, 2021	5,034,959		685,000	16,749	1,922,382	2,757,208			4,718	(351,098)	0	5,034,959
Net income	662,155					662,155
Unit amortization, net of forfeitures					150,408
Distributions under employee plans					(144,658)	(65,415)				104,447
Dividends declared, Common						(148,694)
Dividends declared, Preferred						(37,281)
Unrealized gains/(losses) on securities, net of tax	(177,731)	[1],[2]							(177,731)
Foreign currency translation adjustment, net of tax	55,053	[1],[3]							55,053
Other					(63)	1,122
Common stock repurchased	(105,800)									(105,831)
Balance, end of year at Dec. 31, 2022	$ 5,328,471		$ 685,000	$ 16,749	$ 1,928,069	$ 3,169,095			$ (117,960)	$ (352,482)	$ 0	$ 5,328,471

[1] Net of a tax benefit of $41.3 million, tax benefit of $6.7 million, and tax expense of $11.5 million for the years ended December 31, 2022, 2021, and 2020, respectively.

[2] There were no reclassifications to earnings for the years ended December 31, 2022, 2021, and 2020.

[3] During the year ended December 31, 2022, we closed our derivative instruments used to hedge the foreign exchange risk related to our equity investment in non-U.S. Dollar functional currency foreign subsidiaries, primarily the British Pound and Euro. The cumulative gain recognized on these hedges was $98.3 million (net of $23.3 million in taxes). We expect minimal, if any, of these gains to be reclassified from other comprehensive income into earnings over the next 12 months.

[4] Cumulative adjustments for accounting changes relate to the adoption of certain accounting updates. See Note 2 of the Notes to Consolidated Financial Statements for additional information.