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Acquisitions (Acquired Intangible Assets Subject to Amortization and Values and Estimated Useful Lives) (Detail) - OnCourse Learning [Member] $ in Thousands |  | 1 Months Ended
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May 31, 2019 USD ($) | May 31, 2019 USD ($)
Business Acquisition [Line Items] |  |
Amortizable intangible assets, estimated useful lives | 9 years |
Customer Relationships [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets, finite lived | $ 26,400 | $ 26,400
Amortizable intangible assets, estimated useful lives |  | 11 years
Curriculum/Software [Member] |  |
Business Acquisition [Line Items] |  |
Intangible assets, finite lived | 11,600 | $ 11,600
Amortizable intangible assets, estimated useful lives |  | 6 years
Course Delivery Technology |  |
Business Acquisition [Line Items] |  |
Intangible assets, finite lived | $ 6,700 | $ 6,700
Amortizable intangible assets, estimated useful lives |  | 5 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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