Segment Information Balance Sheet Data (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) segment	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Operating Segments | segment	2
Total Assets	$ 5,721,157	$ 6,704,185
Experiential Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	5,060,248	5,133,486
Education Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	511,170	529,755
Corporate / Unallocated
Segment Reporting Information [Line Items]
Total Assets	$ 149,739	$ 1,040,944