Segment Information Balance Sheet Data (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Operating Segments | segment	2
Total Assets	$ 6,907,210	$ 6,577,511
Experiential Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	5,179,510	5,307,295
Education Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	726,271	730,165
Corporate / Unallocated
Segment Reporting Information [Line Items]
Total Assets	$ 1,001,429	$ 540,051