Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Consolidated Income Statements
Service revenue	$ 960,899	$ 911,306	$ 896,564
Costs and expenses:
Technology and academic services	154,870	150,493	132,078
Counseling services and support	302,319	273,313	249,179
Marketing and communication	202,800	196,090	182,872
General and administrative	43,235	45,491	41,826
Amortization of intangible assets	8,419	8,419	8,419
Total costs and expenses	711,643	673,806	614,374
Operating income	249,256	237,500	282,190
Interest income on Secured Note			52,090
Interest expense	(33)	(2)	(3,601)
Investment interest and other	10,452	2,621	610
Income before income taxes	259,675	240,119	331,289
Income tax expense	54,690	55,444	70,945
Net income	$ 204,985	$ 184,675	$ 260,344
Earnings per share:
Basic income per share	$ 6.83	$ 5.75	$ 5.94
Diluted income per share	$ 6.80	$ 5.73	$ 5.92
Basic weighted average shares outstanding	29,991	32,131	43,835
Diluted weighted average shares outstanding	30,147	32,237	43,958