STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating revenue
Total operating revenue	$ 858,938	$ 741,236	$ 2,451,273	$ 2,139,489
Operating expenses
Total operating expenses	710,467	634,764	2,058,101	1,844,705
Operating income	148,471	106,472	393,172	294,784
Investment income
Net investment income	14,642	5,834	30,360	24,606
Net realized and unrealized investment losses	(2,227)	(6,230)	(9,246)	(23,833)
Net impairment losses recognized in earnings	(113)	(175)	(1,917)	(429)
Total investment income (loss)	12,302	(571)	19,197	344
Interest expense	0	115	0	2,009
Other income	3,001	562	9,643	1,372
Income before income taxes	163,774	106,348	422,012	294,491
Income tax expense	32,734	22,035	86,879	61,412
Net income	$ 131,040	$ 84,313	$ 335,133	$ 233,079
Class A common stock
Earnings per share - Basic and diluted:
Common stock - basic (in dollars per share)	$ 2.81	$ 1.81	$ 7.20	$ 5.00
Common stock - diluted (in dollars per share)	$ 2.51	$ 1.61	$ 6.41	$ 4.46
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	46,189,037	46,189,025	46,188,962	46,188,878
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	52,299,369	52,296,411	52,298,655	52,297,685
Dividends declared per share
Dividends declared (in dollars per share)	$ 1.19	$ 1.11	$ 3.57	$ 3.33
Class B common stock
Earnings per share - Basic and diluted:
Common stock - basic (in dollars per share)	422	272	1,079	751
Common stock - diluted (in dollars per share)	$ 422	$ 272	$ 1,079	$ 751
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)	$ 178.50	$ 166.50	$ 535.50	$ 499.50
Management fee revenue - policy issuance and renewal services
Operating revenue
Total operating revenue	$ 649,049	$ 551,666	$ 1,840,478	$ 1,584,213
Operating expenses
Total operating expenses	523,349	466,111	1,513,690	1,352,050
Management fee revenue - administrative services
Operating revenue
Total operating revenue	16,151	14,657	46,976	43,446
Administrative services reimbursement revenue
Operating revenue
Total operating revenue	187,118	168,653	544,411	492,655
Operating expenses
Total operating expenses	187,118	168,653	544,411	492,655
Service agreement revenue
Operating revenue
Total operating revenue	$ 6,620	$ 6,260	$ 19,408	$ 19,175