Investment in Real Estate (Details) $ in Millions						3 Months Ended
	Sep. 10, 2019 USD ($) marina	May 29, 2019 USD ($) site	Apr. 10, 2019 USD ($) site	Mar. 25, 2019 USD ($) site	Jan. 23, 2019 USD ($) property site	Mar. 31, 2019 USD ($)
Disposed of by Sale | Manufactured Homes in Indiana and Michigan
Business Acquisition
Number of properties sold | property					5
Number of sites sold (sites) | site					1,463
Proceeds from sales of properties					$ 89.7
Gin on sales of properties						$ 52.5
Loggerhead Marina Portfolio
Business Acquisition
Number of marinas (marinas) | marina	11
Purchase price	$ 49.0
Ownership interest (percent)	100.00%
Repayments of outstanding debt	$ 72.0
White Oak Shores Camping and RV Resort
Business Acquisition
Purchase price		$ 20.5
Number of acquired sites (sites) | site		455
Round Top RV Campground
Business Acquisition
Purchase price			$ 12.4
Number of acquired sites (sites) | site			391
Liabilities incurred			$ 7.8
Mortgage premium transferred			$ 0.2
Drummer Boy
Business Acquisition
Purchase price				$ 25.4
Liabilities incurred				10.8
Mortgage premium transferred				$ 0.4
Drummer Boy | Gettysburg, Pennsylvania and Lake of the Woods Campground
Business Acquisition
Number of acquired sites (sites) | site				465
Drummer Boy | Wautoma, Wisconsin
Business Acquisition
Number of acquired sites (sites) | site				303