Acquisition Accounting - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Nov. 01, 2013	Dec. 31, 2014	Nov. 01, 2013
Business Acquisition [Line Items]
Business acquisition purchase price		$ 46,764,000
Fair value of contingently issuable shares		636,000
Hondros College of Nursing Segment
Business Acquisition [Line Items]
Business acquisition date		Nov. 01, 2013
Business acquisition purchase price	46,300,000
Business acquisition goodwill tax deductible amount	38,100,000		38,100,000
Fair value of contingently issuable shares	150,000
Increase in estimated fair value of contingent obligation		636,000
Hondros College of Nursing Segment | Revised Value
Business Acquisition [Line Items]
Business acquisition purchase price		46,800,000
Business acquisition goodwill tax deductible amount		$ 38,600,000