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, Common	Accumulated Other Comprehensive Income (Loss) [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interests [Member]
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 income (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 income (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
Balance, beginning of period (in shares) at Dec. 31, 2022		76,423			9,465
Balance, beginning of period at Dec. 31, 2022	4,687,358	$ 5	1,390,395	4,824,164	$ (694,960)	(836,955)	4,682,649	4,709
Net income	448,611			448,171			448,171	440
Other comprehensive income (loss)	(92,030)					(92,030)	(92,030)
Repurchase of common stock (in shares)					1,413
Repurchase of common stock	(126,611)				$ (126,611)		(126,611)
Non-vested shares awarded, net (in shares)		165
Vesting of non-vested shares (in shares)					45
Vesting of non-vested shares	(4,695)				$ (4,695)		(4,695)
Share-based compensation	14,273		14,273				14,273
Cash dividends on common stock	(107,738)			(107,738)			(107,738)
Capital calls and distributions, net	(1,960)							(1,960)
Balance, end of period (in shares) at Sep. 30, 2023		76,588			10,923
Balance, end of period at Sep. 30, 2023	4,817,208	$ 5	1,404,668	5,164,597	$ (826,266)	(928,985)	4,814,019	3,189
Balance, beginning of period (in shares) at Jun. 30, 2023		76,592			10,223
Balance, beginning of period at Jun. 30, 2023	4,867,397	$ 5	1,401,509	5,065,733	$ (766,721)	(836,672)	4,863,854	3,543
Net income	134,479			134,495			134,495	(16)
Other comprehensive income (loss)	(92,313)					(92,313)	(92,313)
Repurchase of common stock (in shares)					700
Repurchase of common stock	(59,545)				$ (59,545)		(59,545)
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	3,159		3,159				3,159
Cash dividends on common stock	(35,631)			(35,631)			(35,631)
Capital calls and distributions, net	(338)							(338)
Balance, end of period (in shares) at Sep. 30, 2023		76,588			10,923
Balance, end of period at Sep. 30, 2023	$ 4,817,208	$ 5	$ 1,404,668	$ 5,164,597	$ (826,266)	$ (928,985)	$ 4,814,019	$ 3,189