Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 19,280	$ 15,359	$ 13,328
Additions/ (Reductions)	20,785	18,568	17,484
Write-Offs	(18,952)	(14,647)	(15,453)
Balance at End of Period	21,113	19,280	15,359
APUS Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	2,993	2,770	1,711
Additions/ (Reductions)	3,536	2,281	2,694
Write-Offs	(2,367)	(2,058)	(1,635)
Balance at End of Period	4,162	2,993	2,770
RU Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	4,644	3,922	4,547
Additions/ (Reductions)	9,710	8,348	8,694
Write-Offs	(9,499)	(7,626)	(9,319)
Balance at End of Period	4,855	4,644	3,922
HCN Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	10,378	8,130	6,938
Additions/ (Reductions)	8,162	7,211	5,691
Write-Offs	(6,444)	(4,963)	(4,499)
Balance at End of Period	12,096	10,378	8,130
Corporate and Other
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	1,265	537	132
Additions/ (Reductions)	(623)	728	405
Write-Offs	(642)	0	0
Balance at End of Period	$ 0	$ 1,265	$ 537