STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Management fee received	$ 2,420,192	$ 2,100,989	$ 1,982,092
Administrative services reimbursements received	721,928	668,857	634,300
Service agreement revenue received	26,018	25,515	24,014
Net investment income received	57,448	40,161	45,830
Commissions paid to agents	(1,200,014)	(1,042,158)	(966,285)
Incentive compensation paid to agents	(120,211)	(136,403)	(123,583)
Salaries and wages paid	(226,036)	(208,575)	(204,279)
Pension contribution and employee benefits paid	(169,762)	(68,433)	(32,836)
General operating expenses paid	(293,857)	(263,524)	(235,294)
Administrative services expenses paid	(730,129)	(667,524)	(632,530)
Income taxes paid	(104,372)	(80,619)	(84,494)
Interest paid	0	(2,134)	(4,141)
Net cash provided by operating activities	381,205	366,152	402,794
Purchase of investments:
Available-for-sale securities	(279,999)	(465,071)	(380,017)
Equity securities	(35,480)	(18,929)	(58,191)
Other investments	(88)	(157)	(1,646)
Proceeds from investments:
Available-for-sale securities sales	160,614	295,996	150,153
Available-for-sale securities maturities/calls	76,617	130,401	184,820
Equity securities	24,458	20,456	64,118
Other investments	871	429	1,076
Purchase of fixed assets	(92,647)	(67,204)	(148,800)
Proceeds from disposal of fixed assets	0	265	0
Loans to agents and other	(20,525)	(11,631)	(6,382)
Collections on agent and other loans	8,614	8,523	9,379
Net cash used in investing activities	(157,565)	(106,922)	(185,490)
Cash flows from financing activities
Dividends paid to shareholders	(221,675)	(206,772)	(192,801)
Proceeds from short-term borrowings	0	55,000	0
Payments on short-term borrowings	0	(55,000)	0
Payments on long-term borrowings	0	(94,070)	(2,041)
Net cash used in financing activities	(221,675)	(300,842)	(194,842)
Net increase (decrease) in cash, cash equivalents, and restricted cash	1,965	(41,612)	22,462
Cash, cash equivalents, and restricted cash, beginning of year	142,090	183,702	161,240
Cash, cash equivalents, and restricted cash, end of year	144,055	142,090	183,702
Supplemental disclosure of noncash transactions
Liability incurred to purchase fixed assets	0	26,386	12,802
Operating lease assets obtained in exchange for lease liabilities	$ 5,866	$ 7,650	$ 3,447