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Contingencies - Additional Information (Detail) $ in Thousands | 3 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 USD ($) | Jul. 31, 2018 Claim | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Number of arbitration claims filed | Claim |  | 319 |  |  |
Write-off of accounts receivable |  |  | $ 29,740 | $ 28,179 | $ 29,136
Student receivables, net of allowance for doubtful accounts | $ 942 |  | $ 942 | 2,548 |
AG Agreement [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Aggregate pre-tax charge | 6,400 |  |  |  |
Payment to the collective group of attorneys general to cover expenses incurred during the course of their inquiry | $ 5,000 |  |  |  |
Inquiry period | 5 years |  |  |  |
Accounts receivable, description |  |  | The write-off of approximately $1.4 million of accounts receivable. Although the Company agreed to forgo efforts to collect on approximately $556 million of old accounts receivable that were incurred during the last 30 years by students at over 100 campuses who reside in participating states, all but approximately $1.4 million of these old accounts receivable were written-off in prior reporting periods over the last 30 years in the ordinary course of the Company’s operations. The agreement to forgo efforts to collect on these previously written-off receivables does not require any additional write-off expense to the Company’s financial statements. |  |
Write-off of accounts receivable | $ 1,400 |  |  |  |
Student receivables, net of allowance for doubtful accounts | 556,000 |  | $ 556,000 |  |
Committed to reimburse the administrator’s fees and expenses to be paid over the next three years. | 2,000 |  |  |  |
Duration of agreement period, operational aspects |  |  | 6 years |  |
Other Current Liabilities [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Accrual for legal fees and settlements | $ 6,100 |  | $ 6,100 | $ 8,700 |

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