Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 15,359	$ 13,328	$ 11,396
Additions/ (Reductions)	18,568	17,484	15,153
Write-Offs	(14,647)	(15,453)	(13,221)
Balance at End of Period	19,280	15,359	13,328
APUS Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	2,770	1,711	1,750
Additions/ (Reductions)	2,281	2,694	1,658
Write-Offs	(2,058)	(1,635)	(1,697)
Balance at End of Period	2,993	2,770	1,711
RU Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	3,922	4,547	3,444
Additions/ (Reductions)	8,348	8,694	8,657
Write-Offs	(7,626)	(9,319)	(7,554)
Balance at End of Period	4,644	3,922	4,547
HCN Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	8,130	6,938	6,202
Additions/ (Reductions)	7,211	5,691	4,706
Write-Offs	(4,963)	(4,499)	(3,970)
Balance at End of Period	10,378	8,130	6,938
Corporate and Other
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	537	132	0
Additions/ (Reductions)	728	405	132
Write-Offs	0	0	0
Balance at End of Period	$ 1,265	$ 537	$ 132