CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities
Management fee received	$ 3,209,511	$ 2,898,367	$ 2,420,192
Administrative services reimbursements received	814,106	776,150	721,928
Service agreement revenue received	24,751	26,346	26,018
Net investment income received	78,699	67,643	57,448
Commissions paid to agents	(1,608,605)	(1,443,296)	(1,200,014)
Incentive compensation paid to agents	(94,794)	(94,864)	(120,211)
Salaries and wages paid	(264,406)	(249,137)	(226,036)
Pension contribution and employee benefits paid	(115,260)	(110,764)	(169,762)
General operating expenses paid	(316,643)	(308,273)	(293,857)
Administrative services expenses paid	(836,702)	(791,050)	(730,129)
Contribution to charitable foundation	(100,000)	0	0
Income taxes paid	(104,000)	(159,873)	(104,372)
Net cash provided by operating activities	686,657	611,249	381,205
Purchase of investments:
Available-for-sale securities	(693,066)	(473,647)	(279,999)
Equity securities	(36,926)	(32,799)	(35,480)
Other investments	(50)	(7,075)	(88)
Proceeds from investments:
Available-for-sale securities sales	205,965	205,159	160,614
Available-for-sale securities maturities/calls	188,569	196,641	76,617
Equity securities	34,339	35,894	24,458
Other investments	167	54	871
Purchase of fixed assets	(115,692)	(124,845)	(92,647)
Loans to agents and others	(35,505)	(36,362)	(20,525)
Collections on agent and other loans	12,871	10,068	8,614
Net cash used in investing activities	(439,328)	(226,912)	(157,565)
Cash flows from financing activities
Dividends paid to shareholders	(254,275)	(237,508)	(221,675)
Net changes in cash collateral for securities lent	54,423	7,513	0
Net cash used in financing activities	(199,852)	(229,995)	(221,675)
Net increase in cash, cash equivalents and restricted cash	47,477	154,342	1,965
Cash, cash equivalents and restricted cash, beginning of year	298,397	144,055	142,090
Cash, cash equivalents and restricted cash, end of year	345,874	298,397	144,055
Supplemental disclosure of noncash transactions
Liability incurred to purchase fixed assets	26,361	15,254	0
Operating lease assets obtained in exchange for lease liabilities	4,000	7,871	5,866
Receipt of donated equipment	$ 1,967	$ 0	$ 0