Business and Geographic Segment Information - Schedule of Assets by Geographic Areas (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Assets	$ 7,516,758	$ 7,391,723
Operating Segments | Brazil
Segment Reporting Information [Line Items]
Assets	1,270,981	1,256,364
Operating Segments | Mexico
Segment Reporting Information [Line Items]
Assets	1,045,381	969,400
Operating Segments | Andean & Iberian
Segment Reporting Information [Line Items]
Assets	2,318,081	2,117,317
Operating Segments | Central America & U.S. Campuses
Segment Reporting Information [Line Items]
Assets	366,058	376,070
Operating Segments | EMEAA
Segment Reporting Information [Line Items]
Assets	870,789	1,022,569
Operating Segments | Online & Partnerships
Segment Reporting Information [Line Items]
Assets	1,280,811	1,294,147
Corporate
Segment Reporting Information [Line Items]
Assets	$ 364,657	$ 355,856