Schedule II Valuation and Qualifying Accounts (Details) - Allowance for receivables - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 13,012	$ 10,699	$ 13,175
Additions/ (reductions)	6,759	12,714	18,824
Write-offs	(11,694)	(10,401)	(21,300)
Balance at end of period	8,077	13,012	10,699
APEI Segment
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	10,286	8,461	11,452
Additions/ (reductions)	4,861	11,203	17,480
Write-offs	(10,435)	(9,378)	(20,471)
Balance at end of period	4,712	10,286	8,461
Hondros College of Nursing Segment
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	2,726	2,238	1,723
Additions/ (reductions)	1,898	1,511	1,344
Write-offs	(1,259)	(1,023)	(829)
Balance at end of period	$ 3,365	$ 2,726	$ 2,238