UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenues	$ 290,336	$ 265,302
Costs and expenses:
Instructional and support costs	152,805	132,936
General and administration	86,845	69,226
Amortization of intangible assets	19,407	15,417
Merger and integration costs	1,012	3,764
Restructuring costs	18,267	0
Total costs and expenses	278,336	221,343
Income from operations	12,000	43,959
Other income	2,167	2,123
Income before income taxes	14,167	46,082
Provision for income taxes	4,590	10,843
Net income	$ 9,577	$ 35,239
Earnings per share:
Basic (in dollars per share)	$ 0.40	$ 1.62
Diluted (in dollars per share)	$ 0.40	$ 1.60
Weighted average shares outstanding:
Basic (in shares)	23,974	21,810
Diluted (in shares)	24,153	22,071