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Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]          
Revenue $ 146,222 $ 182,626 $ 308,331 $ 381,512  
Percentage of total revenue 100.00% 100.00% 100.00% 100.00%  
Operating Income (Loss) $ 9,104 $ 17,290 $ 18,885 $ 24,269  
Total Assets [1] 506,475   506,475   $ 559,601
Discontinued Operations [Member]          
Segment Reporting Information [Line Items]          
Total Assets [1] 6,087   6,087   6,253
University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 137,419 $ 142,344 $ 285,707 $ 287,283  
Percentage of total revenue 94.00% 77.90% 92.70% 75.30%  
Operating Income (Loss) $ 29,139 $ 36,808 $ 56,815 $ 57,952  
Total Assets [1] 141,269   141,269   142,224
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Operating Income (Loss) (5,847) (5,761) (10,396) (11,573)  
Total Assets [1] 290,811   290,811   334,945
Subtotal [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 137,419 $ 142,344 $ 285,707 $ 287,283  
Percentage of total revenue 94.00% 77.90% 92.70% 75.30%  
Operating Income (Loss) $ 23,292 $ 31,047 $ 46,419 $ 46,379  
Total Assets [1] 432,080   432,080   477,169
Culinary Arts [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 6,646 $ 29,998 $ 16,935 $ 68,621  
Percentage of total revenue 4.50% 16.40% 5.50% 18.00%  
Operating Income (Loss) $ (6,753) $ 361 $ (11,012) $ 3,467  
Total Assets [1] 52,324   52,324   57,443
Transitional Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 2,157 $ 10,284 $ 5,689 $ 25,608  
Percentage of total revenue 1.50% 5.60% 1.80% 6.70%  
Operating Income (Loss) $ (7,435) $ (14,118) $ (16,522) $ (25,577)  
Total Assets [1] 15,984   15,984   18,736
CTU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 91,204 $ 91,736 $ 185,239 $ 183,702  
Percentage of total revenue 62.40% 50.20% 60.10% 48.20%  
Operating Income (Loss) $ 28,064 $ 29,970 $ 51,084 $ 49,207  
Total Assets [1] 73,081   73,081   76,143
AIU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 46,215 $ 50,608 $ 100,468 $ 103,581  
Percentage of total revenue 31.60% 27.70% 32.60% 27.20%  
Operating Income (Loss) $ 1,075 $ 6,838 $ 5,731 $ 8,745  
Total Assets [1] $ 68,188   $ 68,188   $ 66,081
[1] Total assets do not include intercompany receivable or payable activity between schools and corporate and investments in subsidiaries.