Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common stocks	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Unrealized investment gains (losses	Currency Translation Adjustments	Treasury Stock	Noncontrolling Interests
Beginning of period at Dec. 31, 2020		$ 105,803	$ 977,215	$ 8,348,381		$ 289,714	$ (351,886)	$ (3,058,425)	$ 14,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock units issued			(44,041)
Restricted stock units expensed			47,930
Change in unrealized gains (losses) on securities without an allowance for expected credit losses	$ (198,812)					(208,938)
Change in unrealized gains (losses) on securities with an allowance for expected credit losses						10,124
Net change in period	(20,969)						(20,969)
Stock exercised/vested								13,775
Stock repurchased								(122,426)
Other								0
(Distributions) contributions									(8,799)
Net income	1,031,015			1,022,490					8,525
Dividends ($1.93, $0.89, and $1.34 per share, respectively)				(355,736)
Other comprehensive loss, net of tax	(219,781)								(2)
End of period at Dec. 31, 2021		105,803	981,104	9,015,135	$ (281,955)	90,900	(372,855)	(3,167,076)	14,719
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock units issued			(32,622)
Restricted stock units expensed			49,052
Change in unrealized gains (losses) on securities without an allowance for expected credit losses	(983,803)					(955,435)
Change in unrealized gains (losses) on securities with an allowance for expected credit losses						(28,370)
Net change in period	1,179						1,179
Stock exercised/vested								9,787
Stock repurchased								(94,140)
Other								0
(Distributions) contributions									1,220
Net income	1,384,954			1,381,062					3,892
Dividends ($1.93, $0.89, and $1.34 per share, respectively)				(235,192)
Other comprehensive loss, net of tax	(982,624)				(982,624)		1,179		(2)
End of period at Dec. 31, 2022	6,768,161	$ 105,803	997,534	10,161,005	(1,264,581)	(892,905)	(371,676)	(3,251,429)	19,829
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock units issued			(29,043)
Restricted stock units expensed			49,200
Change in unrealized gains (losses) on securities without an allowance for expected credit losses	306,553					305,908
Change in unrealized gains (losses) on securities with an allowance for expected credit losses						643
Net change in period	32,192						32,192
Stock exercised/vested								10,381
Stock repurchased								(537,163)
Other								(4,922)
(Distributions) contributions									(8,508)
Net income	1,383,846			1,381,359					2,487
Dividends ($1.93, $0.89, and $1.34 per share, respectively)				(501,456)
Other comprehensive loss, net of tax	338,745				338,745		32,192		(2)
End of period at Dec. 31, 2023	$ 7,469,237		$ 1,017,691	$ 11,040,908	$ (925,838)	$ (586,354)	$ (339,484)	$ (3,783,133)	$ 13,806