Commitments and Contingencies - Standby Letters of Credit, Surety Bonds and Other Commitments (Details) € in Thousands	Mar. 31, 2020 USD ($)	Mar. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Nov. 30, 2016 USD ($)
Surety Bond
Debt Instrument [Line Items]
Guarantee amount, maximum potential amount of payments	$ 26,069,000		$ 25,852,000
Cash Collateralized Letter Of Credit - Spain Tax Audits
Debt Instrument [Line Items]
Letters of credit outstanding, amount	10,500,000	€ 9,443	5,500,000	€ 5,036
Non-Collateralized Surety Bond - UAM Brazil | Surety Bond
Debt Instrument [Line Items]
Guarantee amount, maximum potential amount of payments					$ 15,300,000
Cost of surety bond					$ 1,400,000
Kendall College, St. Augustine, Walden University, and NewSchool of Architecture and Design
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 125,800,000		$ 127,300,000