CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Management fee received	$ 2,898,367	$ 2,420,192	$ 2,100,989
Administrative services reimbursements received	776,150	721,928	668,857
Service agreement revenue received	26,346	26,018	25,515
Net investment income received	67,643	57,448	40,161
Commissions paid to agents	(1,443,296)	(1,200,014)	(1,042,158)
Incentive compensation paid to agents	(94,864)	(120,211)	(136,403)
Salaries and wages paid	(249,137)	(226,036)	(208,575)
Pension contribution and employee benefits paid	(110,764)	(169,762)	(68,433)
General operating expenses paid	(308,273)	(293,857)	(263,524)
Administrative services expenses paid	(791,050)	(730,129)	(667,524)
Income taxes paid	(159,873)	(104,372)	(80,619)
Interest paid	0	0	(2,134)
Net cash provided by operating activities	611,249	381,205	366,152
Purchase of investments:
Available-for-sale securities	(473,647)	(279,999)	(465,071)
Equity securities	(32,799)	(35,480)	(18,929)
Other investments	(7,075)	(88)	(157)
Proceeds from investments:
Available-for-sale securities sales	205,159	160,614	295,996
Available-for-sale securities maturities/calls	196,641	76,617	130,401
Equity securities	35,894	24,458	20,456
Other investments	54	871	429
Purchase of fixed assets	(124,845)	(92,647)	(67,204)
Proceeds from disposal of fixed assets	0	0	265
Loans to agents and others	(36,362)	(20,525)	(11,631)
Collections on agent loans	10,068	8,614	8,523
Net cash used in investing activities	(226,912)	(157,565)	(106,922)
Cash flows from financing activities
Dividends paid to shareholders	(237,508)	(221,675)	(206,772)
Net changes in cash collateral for securities lent	7,513	0	0
Proceeds from short-term borrowings	0	0	55,000
Payments on short-term borrowings	0	0	(55,000)
Payments on long-term borrowings	0	0	(94,070)
Net cash used in financing activities	(229,995)	(221,675)	(300,842)
Net increase (decrease) in cash, cash equivalents and restricted cash	154,342	1,965	(41,612)
Cash, cash equivalents and restricted cash, beginning of year	144,055	142,090	183,702
Cash, cash equivalents and restricted cash, end of year	298,397	144,055	142,090
Supplemental disclosure of noncash transactions
Liability incurred to purchase fixed assets	15,254	0	26,386
Operating lease assets obtained in exchange for lease liabilities	$ 7,871	$ 5,866	$ 7,650