Basis of Presentation - Concentration (Details) - Customer Concentration Risk - Sales Revenue, Services, Net	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
American Public Education Segment | Title IV programs
Concentration Risk [Line Items]
Percentage of segment revenue	29.00%	33.00%
American Public Education Segment | DoD tuition assistance programs
Concentration Risk [Line Items]
Percentage of segment revenue	36.00%	35.00%
American Public Education Segment | VA education benefits
Concentration Risk [Line Items]
Percentage of segment revenue	22.00%	20.00%
American Public Education Segment | Cash and other sources
Concentration Risk [Line Items]
Percentage of segment revenue	13.00%	12.00%
Hondros College of Nursing Segment | Title IV programs
Concentration Risk [Line Items]
Percentage of segment revenue	85.00%