Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Adjustments for Accounting Changes [Member]	[1]	AOCI Attributable to Parent	Treasury Stock at Cost [Member]	Parent [Member]	Non-controlling Interests [Member]
Balance, beginning of period at Dec. 31, 2018			$ 150,000	$ 11,166	$ 1,893,304	$ 1,366,503	$ (10,809)		$ (72,523)	$ (180,857)		$ 30,000
Common stock repurchased	$ (125,000)									(124,966)
Unit amortization, net of forfeitures					60,088
Distributions under employee plans					(81,194)	(18,292)				69,227
Net income	208,292					209,196
Dividends declared, Common						(25,677)
Dividends declared, Preferred						(7,632)
Issuance of preferred stock			160,000		(5,012)
Unrealized gains on securities, net of tax	42,084	[2],[3]							42,084
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(3,783)
Foreign currency translation adjustment, net of tax	(1,133)	[3]							(1,133)
Other					23	(587)
Capital contributions from non-controlling interest holders												26,800
Distributions to non-controlling interest holders												(1,408)
Deconsolidation of non-controlling interest												904
Balance, end of period at Jun. 30, 2019	3,485,422		310,000	11,166	1,867,209	1,512,702			(35,355)	(236,596)	$ 3,429,126	56,296
Balance, beginning of period at Mar. 31, 2019			310,000	11,166	1,826,604	1,443,658	(4,050)		(46,381)	(168,424)		56,574
Common stock repurchased	(71,100)									(71,097)
Unit amortization, net of forfeitures					26,771
Distributions under employee plans					14,101	(18,319)				2,925
Net income	109,085					109,757
Dividends declared, Common						(12,733)
Dividends declared, Preferred						(5,288)
Issuance of preferred stock					(306)
Unrealized gains on securities, net of tax	16,284	[2],[3]							16,284
Unrealized gains/(losses) on cash flow hedging activities, net of tax									(1,957)
Foreign currency translation adjustment, net of tax	(3,301)	[3]							(3,301)
Other					39	(323)
Distributions to non-controlling interest holders												(950)
Deconsolidation of non-controlling interest												672
Balance, end of period at Jun. 30, 2019	3,485,422		310,000	11,166	1,867,209	1,512,702			(35,355)	(236,596)	3,429,126	56,296
Balance, beginning of period at Dec. 31, 2019	3,669,790		310,000	11,166	1,909,286	1,715,704	$ (7,772)		(11,705)	(319,660)		54,999
Common stock repurchased	(56,500)									(56,517)
Unit amortization, net of forfeitures					60,616
Distributions under employee plans					(109,986)	(47,511)				58,567
Net income	194,476					194,476
Dividends declared, Common						(28,938)
Dividends declared, Preferred						(9,687)
Issuance of preferred stock			225,000		(7,020)
Dividends declared to equity-award holders					350
Unrealized gains on securities, net of tax	3,344	[2],[3]							3,344
Unrealized gains/(losses) on cash flow hedging activities, net of tax									2,317
Foreign currency translation adjustment, net of tax	(9,978)	[3]							(9,978)
Other					(55)	2,063
Deconsolidation of non-controlling interest												$ (54,999)
Balance, end of period at Jun. 30, 2020	3,884,060		535,000	11,166	1,853,191	1,818,335			(16,022)	(317,610)	3,884,060
Balance, beginning of period at Mar. 31, 2020			310,000	11,166	1,837,950	1,728,911			(96,460)	(321,241)
Common stock repurchased										(357)
Unit amortization, net of forfeitures					26,817
Distributions under employee plans					(4,416)	(794)				3,988
Net income	107,887					107,887
Dividends declared, Common						(14,022)
Dividends declared, Preferred						(4,843)
Issuance of preferred stock			225,000		(7,020)
Unrealized gains on securities, net of tax	76,571	[2],[3]							76,571
Unrealized gains/(losses) on cash flow hedging activities, net of tax									4,023
Foreign currency translation adjustment, net of tax	(156)	[3]							(156)
Other					(140)	1,196
Balance, end of period at Jun. 30, 2020	$ 3,884,060		$ 535,000	$ 11,166	$ 1,853,191	$ 1,818,335			$ (16,022)	$ (317,610)	$ 3,884,060

[1] Cumulative adjustments for accounting changes relate to the adoption of certain accounting updates during 2020 and 2019. See Note 2 to the consolidated financial statements for further information.

[2] Net of reclassifications to earnings of realized gains of $0.2 million for the three months ended June 30, 2020. Net of reclassifications to earnings of realized losses of $0.3 million for the six months ended June 30, 2020. Net of reclassifications to earnings of realized losses of $0.2 million for the three and six months ended June 30, 2019.

[3] Net of tax expense of $26.1 million and $3.9 million for the three months ended June 30, 2020 and 2019, respectively. Net of tax benefit of $1.4 million and tax expense of $13.7 million for the six months ended June 30, 2020 and 2019, respectively.