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Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Revenue $ 168,420 $ 173,998 $ 519,063 $ 533,175  
Percentage of total revenue 100.00% 100.00% 100.00% 100.00%  
Operating Income (Loss) $ 29,324 $ 37,861 $ 106,963 $ 114,440  
Total Assets [1] 899,203   899,203   $ 847,433
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Revenue [2] $ 276 $ 262 [3] $ 858 [3] $ 882 [3]  
Percentage of total revenue [3] 0.20% 0.20% 0.20% 0.20%  
Operating Income (Loss) [3] $ (11,772) $ (11,690) $ (30,423) $ (27,193)  
Total Assets [1],[3] 553,849   553,849   542,954
CTU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 97,562 [4] $ 104,788 [5] $ 311,171 [4],[5] $ 312,645 [5]  
Percentage of total revenue [5] 57.90% 60.20% 59.90% 58.60%  
Operating Income (Loss) [5] $ 31,506 $ 41,217 $ 107,540 $ 112,758  
Total Assets [1] 159,627   159,627   153,072
AIUS [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue $ 70,582 [6] $ 68,948 [7] $ 207,034 [6],[7] $ 219,648 [7]  
Percentage of total revenue [7] 41.90% 39.60% 39.90% 41.20%  
Operating Income (Loss) [7] $ 9,590 $ 8,334 $ 29,846 $ 28,875  
Total Assets [1] $ 185,727   $ 185,727   $ 151,407
[1] Total assets do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.
[2] Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.
[3] Corporate and Other includes results of operations and total assets for closed campuses. Revenue recorded within Corporate and Other relates to miscellaneous non-student related revenue.
[4] CTU includes revenue related to an acquisition completed on September 10, 2021.
[5] CTU results of operations include the Hippo acquisition commencing on the September 10, 2021 date of acquisition.
[6] AIUS includes revenue related to an acquisition completed on July 1, 2022 and an acquisition completed on August 2, 2021.
[7] AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition and the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.