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Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]          
Revenue $ 144,986 $ 167,625 $ 453,317 $ 549,137  
Percentage of total revenue 100.00% 100.00% 100.00% 100.00%  
Operating Income (Loss) $ 4,539 $ (706) $ 23,424 $ 23,563  
Total Assets [1] 501,197   501,197   $ 559,601
Discontinued Operations [Member]          
Segment Reporting Information [Line Items]          
Total Assets [1] 6,093   6,093   6,253
University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 141,469 $ 139,463 $ 427,176 $ 426,746  
Percentage of total revenue 97.60% 83.20% 94.20% 77.70%  
Operating Income (Loss) $ 29,821 $ 21,777 $ 86,636 $ 79,729  
Total Assets [1] 137,864   137,864   142,224
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Operating Income (Loss) (6,199) (5,587) (16,595) (17,160)  
Total Assets [1] 292,929   292,929   334,945
Subtotal [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 141,469 $ 139,463 $ 427,176 $ 426,746  
Percentage of total revenue 97.60% 83.20% 94.20% 77.70%  
Operating Income (Loss) $ 23,622 $ 16,190 $ 70,041 $ 62,569  
Total Assets [1] 430,793   430,793   477,169
Culinary Arts [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 2,367 $ 21,369 $ 19,302 $ 89,990  
Percentage of total revenue 1.60% 12.70% 4.30% 16.40%  
Operating Income (Loss) $ (14,027) $ (1,801) $ (25,039) $ 1,666  
Total Assets [1],[2] 48,995   48,995   57,443
Transitional Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 1,150 $ 6,793 $ 6,839 $ 32,401  
Percentage of total revenue 0.80% 4.10% 1.50% 5.90%  
Operating Income (Loss) $ (5,056) $ (15,095) $ (21,578) $ (40,672)  
Total Assets [1],[2] 15,316   15,316   18,736
CTU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 91,319 $ 90,921 $ 276,558 $ 274,623  
Percentage of total revenue 63.00% 54.20% 61.00% 50.00%  
Operating Income (Loss) $ 27,565 $ 21,486 $ 78,649 $ 70,693  
Total Assets [1] 72,589   72,589   76,143
AIU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 50,150 $ 48,542 $ 150,618 $ 152,123  
Percentage of total revenue 34.60% 29.00% 33.20% 27.70%  
Operating Income (Loss) $ 2,256 $ 291 $ 7,987 $ 9,036  
Total Assets [1] $ 65,275   $ 65,275   $ 66,081
[1] Total assets do not include intercompany receivable or payable activity between schools and corporate and investments in subsidiaries.
[2] Assets are primarily composed of deferred tax assets that may be utilized for the consolidated company to reduce future tax liabilities.