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Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Revenue $ 167,684 $ 175,539 $ 350,643 $ 359,177  
Percentage of total revenue 100.00% 100.00% 100.00% 100.00%  
Operating Income (Loss) $ 33,946 $ 35,962 $ 77,639 $ 76,579  
Total Assets [1] 856,061   856,061   $ 847,433
Corporate and Other [Member]          
Segment Reporting Information [Line Items]          
Revenue [2],[3] $ 303 $ 281 $ 582 $ 620  
Percentage of total revenue [2] 0.20% 0.20% 0.20% 0.10%  
Operating Income (Loss) [2] $ (9,795) $ (8,654) $ (18,651) $ (15,503)  
Total Assets [1],[2] 524,171   524,171   542,954
CTU [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue [5] $ 100,461 [4] $ 102,035 $ 213,609 [4] $ 207,857  
Percentage of total revenue [5] 59.90% 58.10% 60.90% 57.90%  
Operating Income (Loss) [5] $ 33,008 $ 35,398 $ 76,034 $ 71,541  
Total Assets [1] 152,602   152,602   153,072
AIUS [Member] | University Group [Member]          
Segment Reporting Information [Line Items]          
Revenue [7] $ 66,920 [6] $ 73,223 $ 136,452 [6] $ 150,700  
Percentage of total revenue [7] 39.90% 41.70% 38.90% 42.00%  
Operating Income (Loss) [7] $ 10,733 $ 9,218 $ 20,256 $ 20,541  
Total Assets [1] $ 179,288   $ 179,288   $ 151,407
[1] Total assets do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.
[2] 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.
[3] 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 August 2, 2021.
[7] AIUS results of operations include the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.