CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating revenue
Total operating revenue	$ 1,060,097	$ 990,438	$ 2,049,496	$ 1,871,139
Operating expenses
Total operating expenses	860,924	800,230	1,698,947	1,542,119
Operating income	199,173	190,208	350,549	329,020
Investment income
Net investment income	20,030	16,010	39,978	31,913
Net realized and unrealized investment gains (losses)	479	(1,795)	981	58
Net impairment losses recognized in earnings	(909)	(388)	(1,823)	(3,065)
Total investment income	19,600	13,827	39,136	28,906
Other income	1,974	3,292	5,808	6,703
Income before income taxes	220,747	207,327	395,493	364,629
Income tax expense	46,062	43,424	82,391	76,174
Net income	$ 174,685	$ 163,903	$ 313,102	$ 288,455
Class A common stock
Earnings per share - Basic and diluted:
Common stock - basic (in dollars per share)	$ 3.75	$ 3.52	$ 6.72	$ 6.19
Common stock - diluted (in dollars per share)	$ 3.34	$ 3.13	$ 5.99	$ 5.52
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	46,189,063	46,189,042	46,188,984	46,189,028
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	52,304,407	52,305,299	52,304,397	52,303,551
Dividends declared per share
Dividends declared (in dollars per share)	$ 1.365	$ 1.275	$ 2.73	$ 2.55
Class B common stock
Earnings per share - Basic and diluted:
Common stock - basic (in dollars per share)	563	528	1,008	929
Common stock - diluted (in dollars per share)	$ 563	$ 528	$ 1,008	$ 929
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	2,542	2,542	2,542	2,542
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	2,542	2,542	2,542	2,542
Dividends declared per share
Dividends declared (in dollars per share)	$ 204.75	$ 191.25	$ 409.50	$ 382.50
Management fee revenue - policy issuance and renewal services
Operating revenue
Total operating revenue	$ 823,853	$ 760,886	$ 1,578,902	$ 1,426,572
Operating expenses
Total operating expenses	648,280	594,202	1,276,030	1,144,524
Management fee revenue - administrative services
Operating revenue
Total operating revenue	18,296	17,051	35,941	33,985
Administrative services reimbursement revenue
Operating revenue
Total operating revenue	212,644	206,028	422,917	397,595
Operating expenses
Total operating expenses	212,644	206,028	422,917	397,595
Service agreement revenue
Operating revenue
Total operating revenue	$ 5,304	$ 6,473	$ 11,736	$ 12,987