Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Statement of Cash Flows [Abstract]
Cash provided from (used for) operating activities	$ 431,887	$ 350,806
Investments sold or matured:
Fixed maturities available for sale—sold	53,911	27,853
Fixed maturities available for sale—matured or other redemptions	58,796	59,871
Mortgage loans	6,237	7,896
Other long-term investments	18,927	573
Total investments sold or matured	137,871	96,193
Acquisition of investments:
Fixed maturities—available for sale	(236,058)	(682,427)
Mortgage loans	(35,471)	(58,406)
Other long-term investments	(15,889)	(80,468)
Total investments acquired	(287,418)	(821,301)
Net (increase) decrease in policy loans	(8,506)	(7,621)
Net (increase) decrease in short-term investments	(49,031)	23,327
Additions to property and equipment	(11,746)	(9,106)
Investments in low-income housing interests	(21,124)	(13,428)
Cash provided from (used for) investing activities	(239,954)	(731,936)
Cash provided from (used for) financing activities:
Issuance of common stock	81,394	29,763
Cash dividends paid to shareholders	(20,146)	(21,117)
Net borrowing from Federal Home Loan Bank (FHLB)	70,000	242,000
Net borrowing (repayment) of commercial paper	(58,474)	5,304
Proceeds from commercial paper with original maturities greater than 90 days	184,470	0
Repayment of commercial paper with original maturities greater than 90 days	(134,506)	0
Acquisition of treasury stock	(264,544)	(23,469)
Net receipts (payments) from deposit-type products	17,342	124,475
Cash provided from (used for) financing activities	(124,464)	356,956
Effect of foreign exchange rate changes on cash	(524)	4,565
Net increase (decrease) in cash	66,945	(19,609)
Cash at beginning of year	165,325	103,156
Cash at end of period	$ 232,270	$ 83,547

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