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	[1]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Noncontrolling Interest	Parent [Member]
Balance, beginning of year at Dec. 31, 2018			$ 150,000	$ 16,749	$ 1,887,721	$ 1,366,503	$ (11,117)		$ (72,523)	$ (180,857)	$ 30,000
Common stock repurchased										(215,430)
Unit amortization, net of forfeitures					112,864
Distributions under employee plans					(91,898)	(19,819)				76,627
Net income	$ 448,396					449,986					1,590
Dividends declared, Common						(50,743)
Dividends declared, Preferred						(17,319)
Issuance of preferred stock			160,000		(5,012)
Unrealized gains/(losses) on securities, net of tax	60,288	[2],[3]							60,288
Unrealized losses on cash flow hedging activities, net of tax									(4,402)
Foreign currency translation adjustment, net of tax	4,932	[3]							4,932
Other					28	(1,787)
Capital contributions from non-controlling interest holders											26,800
Distributions to non-controlling interest holders											(3,391)
Balance, end of year at Dec. 31, 2019	3,669,790		310,000	16,749	1,903,703	1,715,704			(11,705)	(319,660)	54,999	$ 3,614,791
Common stock repurchased	(58,300)									(58,261)
Unit amortization, net of forfeitures					118,229
Distributions under employee plans					(126,514)	(49,427)				70,182
Net income	503,472					503,472
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	[2],[3]							33,133
Unrealized losses on cash flow hedging activities, net of tax									(651)
Foreign currency translation adjustment, net of tax	6,862	[3]							6,862
Other					219	386
Deconsolidation of non-controlling interest											$ (54,999)
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)		4,238,766
Common stock repurchased	(172,700)									172,741
Unit amortization, net of forfeitures					127,458
Distributions under employee plans					(120,158)	(35,233)				74,568
Net income	824,858					824,858
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)	[2],[3]							(19,385)
Foreign currency translation adjustment, net of tax	(3,536)	[3]							(3,536)
Other					26	(528)
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)		$ 5,034,959

[1] 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.

[2] As part of the adoption of ASU 2019-04, in the third quarter of 2019, the Company made a one-time election to transfer a portion of its held-to-maturity securities to available-for-sale. The transfer resulted in a net of tax increase to comprehensive income of $17.9 million.

[3] Net of a tax benefit of $6.7 million, tax expense of $11.5 million, and tax expense of $20.2 million for the years ended December 31, 2021, 2020, and 2019, respectively.