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Revenue Recognition - Schedule of Previously Reported Balances, Adjustment and Current Reported Balances (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
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Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Student receivables, net of allowance for doubtful accounts, current | $ 23,915 |  | $ 18,875
Deferred revenue | $ 30,278 |  | $ 22,897
ASC Topic 606 [Member] |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Student receivables, net of allowance for doubtful accounts, current |  | $ 25,538 |
Deferred revenue |  | 29,560 |
Impact of Modified Retrospective Adoption of ASC 606 [Member] | ASC Topic 606 [Member] |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Student receivables, net of allowance for doubtful accounts, current |  | 6,663 |
Deferred revenue |  | $ 6,663 |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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