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Segment and Geographic Information - Schedule of Non-cash items (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Non cash items included in segment income (loss) from operations by reportable segment |  |  |
Depreciation and amortization | $ 57,313 | $ 63,124 | $ 103,416
Amortization of intangible assets | 11,457 | 14,350 | 51,495
Stock-based compensation | 19,772 | 21,792 | 18,149
Segments | U.S. Higher Education |  |  |
Non cash items included in segment income (loss) from operations by reportable segment |  |  |
Depreciation and amortization | 33,655 | 35,863 | 38,178
Stock-based compensation | 17,653 | 19,572 | 16,926
Segments | Australia / New Zealand |  |  |
Non cash items included in segment income (loss) from operations by reportable segment |  |  |
Depreciation and amortization | 8,954 | 8,842 | 10,640
Stock-based compensation | (117) | 1,073 | 1,359
Segments | Education Technology Services |  |  |
Non cash items included in segment income (loss) from operations by reportable segment |  |  |
Depreciation and amortization | 2,526 | 1,589 | 1,067
Stock-based compensation | 1,729 | 1,147 | 567
Segment Reconciling Items |  |  |
Non cash items included in segment income (loss) from operations by reportable segment |  |  |
Amortization of intangible assets | 11,457 | 14,350 | 51,495
Merger and integration costs | 336 | 0 | 0
Restructuring costs | 385 | 2,480 | 2,036
Restructuring costs | $ 507 | $ 0 | $ (703)

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
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