Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Consolidated Income Statements
Service revenue	$ 911,306	$ 896,564	$ 844,096
Costs and expenses:
Technology and academic services	150,493	132,078	116,012
Counseling services and support	273,313	249,179	234,534
Marketing and communication	196,090	182,872	164,334
General and administrative	45,491	41,826	43,360
Amortization of intangible assets	8,419	8,419	8,419
Total costs and expenses	673,806	614,374	566,659
Operating income	237,500	282,190	277,437
Interest income on Secured Note		52,090	59,190
Interest expense	(2)	(3,601)	(4,402)
Investment interest and other	2,621	610	915
Income before income taxes	240,119	331,289	333,140
Income tax expense	55,444	70,945	75,944
Net income	$ 184,675	$ 260,344	$ 257,196
Earnings per share:
Basic income per share	$ 5.75	$ 5.94	$ 5.49
Diluted income per share	$ 5.73	$ 5.92	$ 5.45
Basic weighted average shares outstanding	32,131	43,835	46,880
Diluted weighted average shares outstanding	32,237	43,958	47,165