Condensed Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 1,171	$ 144,504	$ 139,074	$ 272,603
Unrealized investment gains (losses) on available-for-sale securities:
Change in unrealized holding gains (losses) on available-for-sale securities	(6,756)	(23,068)	(21,602)	15,364
Reclassification adjustment for investment (gains) losses included in net income	(565)	(331)	(572)	2,815
Effect of change in discount rate assumptions on the liability for future policy benefits	137,798	85,310	305,884	(95,971)
Foreign currency translation adjustments:
Change in unrealized foreign currency translation gains (losses)	(3,817)	7,005	(13,272)	8,026
Total other comprehensive income (loss) before income taxes	126,660	68,916	270,438	(69,766)
Income tax expense (benefit) related to items of other comprehensive income (loss)	27,697	12,651	60,521	(17,380)
Other comprehensive income (loss), net of income taxes	98,963	56,265	209,917	(52,386)
Total comprehensive income (loss)	$ 100,134	$ 200,769	$ 348,991	$ 220,217