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Assets Held for Sale - Summary of Assets and Liabilities of Assets Held for Sale on Balance Sheets (Parenthetical) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Summary Of Assets And Liabilities Held For Sale [Line Items]        
Asset impairment charges [1],[2] $ 9,687 $ 7,451 $ 9,687 $ 7,444
LCB Institutions [Member] | Discontinued Operations [Member]        
Summary Of Assets And Liabilities Held For Sale [Line Items]        
Asset impairment charges $ 9,687 $ 7,400 $ 9,687 $ 7,400
[1] Asset impairment charges for the current year quarter relate to impairment recorded for our LCB campuses which are held for sale as a result of our fair value analysis.
[2] Includes the results of operations for our LCB campuses that are held for sale, which met the criteria to be considered discontinued operations under ASC Topic 360, in addition to our Transitional Group campuses that completed their teach-out prior to 2015.