Subsequent Events (Details)	Nov. 03, 2020 USD ($)	Sep. 30, 2020 USD ($)	Aug. 11, 2020 USD ($)	Aug. 10, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Aug. 01, 2018 USD ($)
Subsequent Event [Line Items]
Cash and cash equivalents		$ 717,804,000			$ 419,693,000	$ 397,094,000
Subsequent Event | Laureate Education, Australia and New Zealand Operations
Subsequent Event [Line Items]
Purchase price paid in cash at closing	$ 662,000,000.0
Value of business acquisition agreement	642,700,000
Purchase price adjustment	19,300,000
Net cash increase at closing	16,000,000.0
Working capital increase at closing	3,300,000
Revolving Credit Facility
Subsequent Event [Line Items]
Maximum leverage ratio allowed in order to increase obligation							1.75
Maximum total leverage ratio		2
Minimum coverage ratio		1.75
Minimum department of education financial composite score		1.5
Revolving Credit Facility | Third Amendment to the Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Maximum aggregate incremental term loans	$ 300,000,000
Percentage of consolidated EBITDA to be funded	100.00%
Maximum leverage ratio allowed in order to increase obligation	1.75
Maximum total leverage ratio	2.00
Cash and cash equivalents	$ 150,000,000
Minimum coverage ratio	1.75
Minimum department of education financial composite score	1.0
Minimum department of education financial composite score for two consecutive fiscal years	1.5
Revolving Credit Facility | Third Amendment to the Credit Facility, Subfacility for Borrowings in Foreign Currencies | Subsequent Event
Subsequent Event [Line Items]
Revolving credit facility, value	$ 150,000,000
Revolving Credit Facility | Amended Credit Facility
Subsequent Event [Line Items]
Revolving credit facility, value			$ 350,000,000	$ 250,000,000			$ 250,000,000
Maximum aggregate incremental term loans							$ 150,000,000