Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent	Treasury Stock, Common [Member]
Balance, beginning of period at Dec. 31, 2021			$ 685,000,000	$ 16,749,000	$ 1,922,382,000	$ 2,757,208,000	$ 4,718,000	$ (351,098,000)
Unit amortization, net of forfeitures					114,536,000
Issuance of preferred stock			0
Net income	$ 485,534,000					485,534,000
Dividends declared, Common						(111,831,000)
Dividends declared, Preferred						(27,961,000)
Distributions under employee plans					(122,467,000)	(52,523,000)		85,153,000
Common stock repurchased	(30,700,000)							(30,666,000)
Unrealized losses on securities, net of tax	(189,820,000)	[1],[2]					(189,820,000)
Foreign currency translation adjustment, net of tax	41,461,000	[1]					41,461,000
Other					(192,000)	1,167,000
Balance, end of period at Sep. 30, 2022	5,227,350,000		685,000,000	16,749,000	1,914,259,000	3,051,594,000	(143,641,000)	(296,611,000)
Balance, beginning of period at Jun. 30, 2022			685,000,000	16,749,000	1,884,455,000	2,948,280,000	(110,043,000)	(299,704,000)
Unit amortization, net of forfeitures					33,358,000
Issuance of preferred stock			0
Net income	151,169,000					151,169,000
Dividends declared, Common						(37,299,000)
Dividends declared, Preferred						(9,320,000)
Distributions under employee plans					(3,300,000)	(1,612,000)		3,093,000
Common stock repurchased	0							0
Unrealized losses on securities, net of tax	(54,290,000)	[1],[2]					(54,290,000)
Foreign currency translation adjustment, net of tax	20,692,000	[1]					20,692,000
Other					(254,000)	376,000
Balance, end of period at Sep. 30, 2022	5,227,350,000		685,000,000	16,749,000	1,914,259,000	3,051,594,000	(143,641,000)	(296,611,000)
Balance, beginning of period at Dec. 31, 2022	5,328,471,000		685,000,000	16,749,000	1,928,069,000	3,169,095,000	(117,960,000)	(352,482,000)
Unit amortization, net of forfeitures					113,426,000
Issuance of preferred stock			0
Net income	360,052,000					360,052,000
Dividends declared, Common						(130,800,000)
Dividends declared, Preferred						(27,961,000)
Distributions under employee plans					(156,080,000)	(73,069,000)		143,071,000
Common stock repurchased	(300,200,000)							(300,152,000)
Unrealized losses on securities, net of tax	(17,113,000)	[1],[2]					(17,113,000)
Foreign currency translation adjustment, net of tax	914,000	[1]					914,000
Other					9,000	1,826,000
Balance, end of period at Sep. 30, 2023	5,242,594,000		685,000,000	16,749,000	1,885,424,000	3,299,143,000	(134,159,000)	(509,563,000)
Balance, beginning of period at Jun. 30, 2023			685,000,000	16,749,000	1,856,578,000	3,286,777,000	(104,515,000)	(397,602,000)
Unit amortization, net of forfeitures					35,862,000
Issuance of preferred stock			0
Net income	68,161,000					68,161,000
Dividends declared, Common						(43,235,000)
Dividends declared, Preferred						(9,321,000)
Distributions under employee plans					(7,016,000)	(3,240,000)		6,849,000
Common stock repurchased	(118,800,000)							(118,810,000)
Unrealized losses on securities, net of tax	(26,172,000)	[1],[2]					(26,172,000)
Foreign currency translation adjustment, net of tax	(3,472,000)	[1]					(3,472,000)
Other					0	1,000
Balance, end of period at Sep. 30, 2023	$ 5,242,594,000		$ 685,000,000	$ 16,749,000	$ 1,885,424,000	$ 3,299,143,000	$ (134,159,000)	$ (509,563,000)

[1] Net of tax benefit of $17.9 million and $12.1 million for the three months ended September 30, 2023 and 2022, respectively. Net of tax benefit of $6.3 million and $50.7 million for the nine months ended September 30, 2023 and 2022, respectively.

[2] There were no reclassifications to earnings for the three months ended September 30, 2023. Net of reclassifications to earnings of realized losses of $5.6 million for the nine months ended September 30, 2023. There were no reclassifications to earnings for the three and nine months ended September 30, 2022.