STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating revenue
Operating revenue	$ 657,019	$ 647,710	$ 1,273,756	$ 1,241,816
Operating expenses
Operating expenses	565,830	551,100	1,096,876	1,059,084
Operating income	91,189	96,610	176,880	182,732
Investment income
Net investment income	7,373	8,030	15,742	16,547
Net realized investment gains (losses)	6,526	1,302	(4,280)	3,805
Net impairment losses recognized in earnings	(17)	(84)	(3,070)	(162)
Equity in (losses) earnings of limited partnerships	(2,329)	404	(6,034)	(743)
Total investment income	11,553	9,652	2,358	19,447
Interest expense, net	2	272	5	721
Other (expense) income	(258)	48	(624)	95
Income before income taxes	102,482	106,038	178,609	201,553
Income tax expense	20,505	18,284	37,306	38,488
Net income	$ 81,977	$ 87,754	$ 141,303	$ 163,065
Class A common stock
Class B – Basic and diluted EPS:
Class A common stock - basic (in dollars per share)	$ 1.76	$ 1.88	$ 3.03	$ 3.50
Class A common stock - diluted (in dollars per share)	$ 1.57	$ 1.68	$ 2.70	$ 3.12
Weighted average shares outstanding – Basic
Common stock - basic (in shares)	46,187,808	46,188,994	46,188,299	46,188,668
Weighted average shares outstanding – Diluted
Common stock - diluted (in shares)	52,302,981	52,314,700	52,313,667	52,313,371
Dividends declared per share
Common stock (in dollars per share)	$ 0.965	$ 0.90	$ 1.93	$ 1.80
Class B common stock
Class B – Basic and diluted EPS:
Class B common stock – basic and diluted (in dollars per share)	$ 264	$ 283	$ 455	$ 525
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
Common stock (in dollars per share)	$ 144.75	$ 135.00	$ 289.50	$ 270.00
Management fee revenue - policy issuance and renewal services, net
Operating revenue
Operating revenue	$ 483,795	$ 480,513	$ 927,545	$ 911,496
Operating expenses
Operating expenses	413,865	405,005	793,357	770,509
Management fee revenue - administrative services, net
Operating revenue
Operating revenue	14,813	14,195	29,584	28,146
Administrative services reimbursement revenue
Operating revenue
Operating revenue	151,965	146,095	303,519	288,575
Operating expenses
Operating expenses	151,965	146,095	303,519	288,575
Service agreement revenue
Operating revenue
Operating revenue	$ 6,446	$ 6,907	$ 13,108	$ 13,599