Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
REVENUE:
Total revenue		$ 710,004	$ 695,208	$ 693,034
OPERATING EXPENSES:
Educational services and facilities		130,324	116,723	108,743
General and administrative		398,084	426,120	418,509
Depreciation and amortization		16,887	19,734	16,766
Asset impairment		14,263	2,994
Total operating expenses		559,558	565,571	544,018
Operating income		150,446	129,637	149,016
OTHER INCOME:
Interest income		19,980	6,866	930
Interest expense		(404)	(400)	(920)
Miscellaneous income (expense)		22,099	(1,834)	41
Total other income		41,675	4,632	51
PRETAX INCOME		192,121	134,269	149,067
Provision for income taxes		44,469	38,402	39,430
NET INCOME		$ 147,652	$ 95,867	$ 109,637
NET INCOME PER SHARE - BASIC:		$ 2.22	$ 1.41	$ 1.57
NET INCOME PER SHARE - DILUTED:		$ 2.18	$ 1.39	$ 1.55
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic		66,468	67,934	70,024
Diluted		67,826	69,031	70,881
Tuition and Fees, Net [Member]
REVENUE:
Total revenue		$ 702,920	$ 687,672	$ 688,415
Other [Member]
REVENUE:
Total revenue	[1]	$ 7,084	$ 7,536	$ 4,619

[1] Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.