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Legal and Regulatory Matters - United States Postsecondary Education Regulation (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) program | Dec. 31, 2016 | Dec. 31, 2017 USD ($)
Kendall College, St. Augustine, Walden University, and NewSchool of Architecture and Design |  |  |
Loss Contingencies [Line Items] |  |  |
Letters of credit outstanding, amount | $ | $ 139,000 |  | $ 136,900
United States |  |  |
Loss Contingencies [Line Items] |  |  |
Percentage of funds received |  | 15.00% |
Number of in the zone programs (program) | program | 3 |  |

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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