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, 2021		$ 158,705	$ 928,202	$ 9,015,135		$ 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
Contributions (distributions)									1,220
Net income	1,384,954			1,381,062					3,892
Dividends ($1.40, $1.29, and $0.59 per share, respectively)				(235,192)
Other comprehensive income (loss), net of tax	(982,624)								(2)
End of period at Dec. 31, 2022		158,705	944,632	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)
Contributions (distributions)									(8,508)
Net income	1,383,846			1,381,359					2,487
Dividends ($1.40, $1.29, and $0.59 per share, respectively)				(501,456)
Other comprehensive income (loss), net of tax	338,745				338,745		32,192		(2)
End of period at Dec. 31, 2023	7,469,237	$ 158,705	964,789	11,040,908	(925,838)	(586,354)	(339,484)	(3,783,133)	13,806
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock units issued			(32,344)
Restricted stock units expensed			52,380
Change in unrealized gains (losses) on securities without an allowance for expected credit losses	69,182					64,756
Change in unrealized gains (losses) on securities with an allowance for expected credit losses						4,428
Net change in period	(77,615)						(77,615)
Stock exercised/vested								10,066
Stock repurchased								(303,655)
Other								(2,498)
Contributions (distributions)									58
Net income	1,754,577			1,756,115					(1,538)
Dividends ($1.40, $1.29, and $0.59 per share, respectively)				(531,953)
Other comprehensive income (loss), net of tax	(8,433)				(8,433)		(77,615)		2
End of period at Dec. 31, 2024	$ 8,407,439		$ 984,825	$ 12,265,070	$ (934,269)	$ (517,170)	$ (417,099)	$ (4,079,220)	$ 12,328