Segment Reporting Segment Reporting, Seasonality (Details) $ in Thousands	3 Months Ended				6 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020 USD ($)	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2021 USD ($) segment	Dec. 31, 2020 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment					3	2
Assets		$ 11,206,586			$ 12,040,990	$ 11,206,586
Goodwill		$ 428,833			448,317	428,833
Real Property Operations Segment [Member]
Segment Reporting Information [Line Items]
Transient RV rental revenue recognized as a percentage	20.70%	44.90%	15.60%	18.80%
Assets		$ 5,353,492			5,387,098	5,353,492
Goodwill		0			0	0
Marina Sale Segment
Segment Reporting Information [Line Items]
Assets		2,622,448			3,180,171	2,622,448
Goodwill		$ 428,833			$ 448,317	$ 428,833