Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interests [Member]
Balance, beginning of period (in shares) at Dec. 31, 2020		75,995			6,358
Balance, beginning of period at Dec. 31, 2020	$ 5,291,561	$ 5	$ 1,368,062	$ 3,973,675	$ (411,344)	$ 335,868	$ 5,266,266	$ 25,295
Net income	499,136			500,803			500,803	(1,667)
Other comprehensive loss	(166,696)					(166,696)	(166,696)
Repurchase of common stock (in shares)					1,231
Repurchase of common stock	(104,512)				$ (104,512)		(104,512)
Stock options exercised (in shares)		17
Stock options exercised	949		949				949
Non-vested shares awarded, net (in shares)		242
Vesting of non-vested shares (in shares)					68
Vesting of non-vested shares	(5,815)				$ (5,815)		(5,815)
Share-based compensation	5,677		5,677				5,677
Cash dividends on common stock	(107,699)			(107,699)			(107,699)
Capital calls and distributions, net	16,153							16,153
Balance, end of period (in shares) at Sep. 30, 2021		76,254			7,657
Balance, end of period at Sep. 30, 2021	5,396,448	$ 5	1,374,688	4,366,779	$ (521,671)	169,172	5,388,973	7,475
Balance, beginning of period (in shares) at Jun. 30, 2021		76,258			7,179
Balance, beginning of period at Jun. 30, 2021	5,354,551	$ 5	1,373,101	4,214,130	$ (481,027)	226,768	5,332,977	21,574
Net income	187,721			188,322			188,322	(601)
Other comprehensive loss	(57,596)					(57,596)	(57,596)
Repurchase of common stock (in shares)					478
Repurchase of common stock	(40,644)				$ (40,644)		(40,644)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
Non-vested shares awarded, net (in shares)		(4)
Vesting of non-vested shares (in shares)					0
Vesting of non-vested shares	0				$ 0		0
Share-based compensation	1,587		1,587				1,587
Cash dividends on common stock	(35,673)			(35,673)			(35,673)
Capital calls and distributions, net	13,498							13,498
Balance, end of period (in shares) at Sep. 30, 2021		76,254			7,657
Balance, end of period at Sep. 30, 2021	5,396,448	$ 5	1,374,688	4,366,779	$ (521,671)	169,172	5,388,973	7,475
Balance, beginning of period (in shares) at Dec. 31, 2021		76,254			7,786
Balance, beginning of period at Dec. 31, 2021	5,368,371	$ 5	1,378,794	4,447,691	$ (535,129)	72,371	5,363,732	4,639
Net income	351,901			351,844			351,844	57
Other comprehensive loss	(977,316)					(977,316)	(977,316)
Repurchase of common stock (in shares)					1,318
Repurchase of common stock	(122,458)				$ (122,458)		(122,458)
Stock options exercised (in shares)		1
Stock options exercised	37		37				37
Non-vested shares awarded, net (in shares)		150
Vesting of non-vested shares (in shares)					46
Vesting of non-vested shares	(4,944)				$ (4,944)		(4,944)
Share-based compensation	6,650		6,650				6,650
Cash dividends on common stock	(107,611)			(107,611)			(107,611)
Capital calls and distributions, net	322							322
Balance, end of period (in shares) at Sep. 30, 2022		76,405			9,150
Balance, end of period at Sep. 30, 2022	4,514,308	$ 5	1,385,481	4,691,924	$ (662,531)	(904,945)	4,509,934	4,374
Balance, beginning of period (in shares) at Jun. 30, 2022		76,408			8,602
Balance, beginning of period at Jun. 30, 2022	4,741,542	$ 5	1,381,676	4,570,837	$ (612,551)	(602,628)	4,737,339	4,203
Net income	156,591			156,510			156,510	81
Other comprehensive loss	(302,317)					(302,317)	(302,317)
Repurchase of common stock (in shares)					548
Repurchase of common stock	(49,980)				$ (49,980)		(49,980)
Stock options exercised (in shares)		0
Stock options exercised	0		0				0
Non-vested shares awarded, net (in shares)		(3)
Vesting of non-vested shares (in shares)					0
Vesting of non-vested shares	0				$ 0		0
Share-based compensation	3,805		3,805				3,805
Cash dividends on common stock	(35,423)			(35,423)			(35,423)
Capital calls and distributions, net	90							90
Balance, end of period (in shares) at Sep. 30, 2022		76,405			9,150
Balance, end of period at Sep. 30, 2022	$ 4,514,308	$ 5	$ 1,385,481	$ 4,691,924	$ (662,531)	$ (904,945)	$ 4,509,934	$ 4,374