Segment Information - Summary of Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue:
Total Revenue	$ 150,838	$ 149,535	$ 447,741	$ 453,890
Depreciation and amortization:
Total Depreciation and amortization	7,026	7,982	22,735	24,249
Income (loss) from operations before interest and income taxes:
Total income (loss) from operations before interest and income taxes	6,400	(1,026)	(64,238)	(137,086)
Interest income (expense):
Total Interest expense, net	(792)	(3,594)	(3,668)	(10,339)
Income tax expense (benefit):
Total Income tax expense (benefit)	3,712	(860)	(12,839)	(35,152)
Capital expenditures:
Total Capital Expenditures	2,952	3,596	9,505	10,905
Corporate and Other
Revenue:
Total Revenue	8,618	7,843	21,142	15,187
Depreciation and amortization:
Total Depreciation and amortization	167	146	450	442
Income (loss) from operations before interest and income taxes:
Total income (loss) from operations before interest and income taxes	(4,337)	(4,266)	(19,314)	(19,845)
Interest income (expense):
Total Interest expense, net	(1,556)	(3,698)	(5,304)	(10,533)
Income tax expense (benefit):
Total Income tax expense (benefit)	(1,351)	4,814	(5,259)	(7,400)
Capital expenditures:
Total Capital Expenditures	1,164	67	1,751	170
APUS Segment | Operating Segments
Revenue:
Total Revenue	76,406	68,735	223,941	211,729
Depreciation and amortization:
Total Depreciation and amortization	1,316	1,573	4,007	4,860
Income (loss) from operations before interest and income taxes:
Total income (loss) from operations before interest and income taxes	21,948	12,532	57,963	39,338
Interest income (expense):
Total Interest expense, net	728	69	1,557	146
Income tax expense (benefit):
Total Income tax expense (benefit)	5,969	(3,557)	15,689	11,628
Capital expenditures:
Total Capital Expenditures	1,243	811	2,892	2,209
RU Segment | Operating Segments
Revenue:
Total Revenue	52,073	61,548	161,511	192,538
Depreciation and amortization:
Total Depreciation and amortization	5,229	6,015	17,351	18,254
Income (loss) from operations before interest and income taxes:
Total income (loss) from operations before interest and income taxes	(10,570)	(7,900)	(100,708)	(153,562)
Interest income (expense):
Total Interest expense, net	10	30	11	38
Income tax expense (benefit):
Total Income tax expense (benefit)	(635)	(2,183)	(22,813)	(38,564)
Capital expenditures:
Total Capital Expenditures	214	1,942	3,499	6,860
HCN Segment | Operating Segments
Revenue:
Total Revenue	13,741	11,409	41,147	34,436
Depreciation and amortization:
Total Depreciation and amortization	314	248	927	693
Income (loss) from operations before interest and income taxes:
Total income (loss) from operations before interest and income taxes	(641)	(1,392)	(2,179)	(3,017)
Interest income (expense):
Total Interest expense, net	26	5	68	10
Income tax expense (benefit):
Total Income tax expense (benefit)	(271)	66	(456)	(816)
Capital expenditures:
Total Capital Expenditures	$ 331	$ 776	$ 1,363	$ 1,666