Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Nov. 01, 2013
Goodwill [Line Items]
Goodwill	$ 33,899		$ 38,634		$ 33,899
Goodwill [Roll Forward]
Goodwill as of December 31, 2015			38,634
Goodwill acquired			0
Accumulated impairment	(4,735)	$ 0	(4,735)	$ 0
Goodwill as of September 30, 2016	33,899		33,899
American Public Education Segment
Goodwill [Line Items]
Goodwill	0		0		0
Goodwill [Roll Forward]
Goodwill as of December 31, 2015			0
Goodwill acquired			0
Accumulated impairment			0
Goodwill as of September 30, 2016	0		0
Hondros College of Nursing Segment
Goodwill [Line Items]
Goodwill	33,899		38,634		33,899
Goodwill [Roll Forward]
Goodwill as of December 31, 2015			38,634
Goodwill acquired			0
Accumulated impairment			(4,735)
Goodwill as of September 30, 2016	33,899		33,899
HCON
Goodwill [Line Items]
Goodwill						$ 38,600
Business combination, identified intangible assets						$ 8,100
Goodwill, fair value					$ 33,900
Goodwill [Roll Forward]
Accumulated impairment	$ (4,700)		$ (4,700)