Notes And Other Receivables Notes and Other Receivables, Other receivables - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Fair Value Adjustment	$ 0	$ 100
Document Period End Date	Mar. 31, 2020
Other receivables for rent, water, sewer usage	$ 16,000	7,800
Allowance for rent, water, sewer usage receivables	(1,800)	(2,200)
Contract with Customer, Asset, Reclassified to Receivable	27,600	20,900
Insurance receivables	8,000	9,900
Other Receivables	5,500
Fair Value, Recurring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Fair Value Adjustment	(2,100)
Fair Value, Recurring [Member] | Installment notes receivable on manufactured homes, net [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Fair Value Adjustment	$ (1,100)	$ 1,000