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Revenue Recognition - Summary of Disaggregation of Revenue by Major Source (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | $ 195,598 |  | $ 182,959
Tuition, Net [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [1] | 184,643 |  | 172,378
Technology and Miscellaneous Fees [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 8,676 |  | 8,949
Tuition and Fees, Net [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 193,319 |  | 181,327
Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [2] | 2,279 |  | 1,632
University Group [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [3] | 124,492 | [4] | 113,148
University Group [Member] | AIUS [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [5],[6] | 70,840 |  | 69,532
University Group [Member] | Tuition, Net [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [1] | 117,998 | [4] | 106,927
University Group [Member] | Tuition, Net [Member] | AIUS [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [1] | 66,645 | [6] | 65,451
University Group [Member] | Technology and Miscellaneous Fees [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 5,423 | [4] | 5,624
University Group [Member] | Technology and Miscellaneous Fees [Member] | AIUS [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 3,253 | [6] | 3,325
University Group [Member] | Tuition and Fees, Net [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 123,421 | [4] | 112,551
University Group [Member] | Tuition and Fees, Net [Member] | AIUS [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 69,898 | [6] | 68,776
University Group [Member] | Other [Member] | CTU [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [2] | 1,071 | [4] | 597
University Group [Member] | Other [Member] | AIUS [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [2] | 942 | [6] | 756
Corporate and Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue |  | 266 |  | 279
Corporate and Other [Member] | Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenue | [2] | $ 266 |  | $ 279
[1] | Tuition includes revenue earned for all degree-granting programs as well as revenue earned for non-degree and professional development programs.
[2] | Other revenue primarily includes contract training revenue and miscellaneous non-student related revenue.
[3] | CTU results of operations include the Coding Dojo acquisition commencing on the December 1, 2022 date of acquisition.
[4] | CTU includes revenue related to an acquisition completed on December 1, 2022.
[5] | AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition.
[6] | AIUS includes revenue relat ed to an acquisition completed on July 1, 2022.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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