Other receivables, Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Premiums and Other Receivables, Net	$ 2.0	$ 5.3
Other receivables for rent, water, sewer usage	6.0	4.7
Allowance for rent, water, sewer usage receivables	(1.5)	(0.9)
Home sale proceeds	11.6	10.5
Insurance receivables	$ 2.3	1.2
Insurance Settlements Receivable		3.7
Miscellaneous note receivable		$ 2.2