Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Impairment Charges [Line Items]
Changes in the carrying amount of goodwill		$ 0	$ 0
Carrying value of goodwill		87,356,000	87,356,000
Definite-lived trade name		1,400,000
Amortization expense from continuing operations		$ 100,000	800,000	$ 1,100,000
LCB Trade Name[Member]
Impairment Charges [Line Items]
Estimated useful lives of intangible assets, in years		21 months
Definite-lived trade name		$ 1,400,000
Trade name impairment charge		$ 17,000,000
Sanford-Brown and Missouri College Trade Name [Member]
Impairment Charges [Line Items]
Trade name impairment charge	$ 1,800,000
Maximum [Member]
Impairment Charges [Line Items]
Estimated useful lives of intangible assets, in years		21 months
CTU [Member]
Impairment Charges [Line Items]
Carrying value of goodwill		$ 45,900,000	45,900,000
AIU [Member]
Impairment Charges [Line Items]
Carrying value of goodwill		$ 41,400,000	$ 41,400,000