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Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Gross deferred revenue, beginning balance |  | $ 67,850 | $ 58,022 | $ 113,719 | $ 85,402
Revenue earned from prior balances |  | (57,208) | (49,791) | (93,499) | (70,507)
Billings during period | [1] | 165,024 | 239,765 | 300,220 | 394,110
Revenue earned for new billings during the period |  | (108,688) | (125,013) | (253,724) | (287,128)
Other adjustments |  | 507 | (1,516) | 769 | (410)
Gross deferred revenue, ending balance |  | 67,485 | 121,467 | 67,485 | 121,467
University Group [Member] | CTU [Member] |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Gross deferred revenue, beginning balance |  | 39,343 | 25,136 | 64,674 | 28,522
Revenue earned from prior balances |  | (33,358) | (22,814) | (55,433) | (25,698)
Billings during period | [1] | 88,990 | 155,861 | 175,611 | 257,645
Revenue earned for new billings during the period |  | (66,391) | (78,828) | (156,867) | (181,324)
Other adjustments |  | 273 | (1,537) | 872 | (1,327)
Gross deferred revenue, ending balance |  | 28,857 | 77,818 | 28,857 | 77,818
University Group [Member] | AIUS [Member] |  |  |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |  |  |
Gross deferred revenue, beginning balance |  | 28,507 | 32,886 | 49,045 | 56,880
Revenue earned from prior balances |  | (23,850) | (26,977) | (38,066) | (44,809)
Billings during period | [1] | 76,034 | 83,904 | 124,609 | 136,465
Revenue earned for new billings during the period |  | (42,297) | (46,185) | (96,857) | (105,804)
Other adjustments |  | 234 | 21 | (103) | 917
Gross deferred revenue, ending balance |  | $ 38,628 | $ 43,649 | $ 38,628 | $ 43,649
[1] | Billings during period includes adjustments for prior billings.

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- Definition The amount of other adjustments to the deferred revenue balance during the current period. + References No definition available. + Details
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