Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 01, 2021
Allowance for receivables
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Additions	$ 13,328	$ 11,396	$ 5,983
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	11,396	5,983	6,174
Additions/ (Reductions)	15,153	11,888	3,802
Write-Offs	(13,221)	(6,475)	(3,993)
Balance at End of Period	13,328	11,396	5,983
APUS Segment
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Additions	1,711	1,750	2,196
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	1,750	2,196	2,240
Additions/ (Reductions)	1,658	1,693	1,276
Write-Offs	(1,697)	(2,139)	(1,320)
Balance at End of Period	1,711	1,750	2,196
RU Segment
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Additions	4,547	3,444	0	$ 3,500
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	3,444	0
Additions/ (Reductions)	8,657	5,902
Write-Offs	(7,554)	(2,458)
Balance at End of Period	4,547	3,444	0
HCN Segment
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Additions	6,938	6,202	3,787
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	6,202	3,787	3,934
Additions/ (Reductions)	4,706	4,293	2,526
Write-Offs	(3,970)	(1,878)	(2,673)
Balance at End of Period	6,938	6,202	$ 3,787
Corporate and Other
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Additions	132	0
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	0
Additions/ (Reductions)	132
Write-Offs	0
Balance at End of Period	$ 132	$ 0