Schedule of installment notes receivable (Details) - Installment notes receivable on manufactured homes, gross [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	$ 59,524	$ 20,610
Financed sales of manufactured homes	66,104	41,322
Acquired notes	23	3,521
Principal payments and payoffs from our customers	(6,128)	(4,363)
Principal reduction from repossessed homes	(3,349)	(1,566)
Total activity	56,650	38,914
Ending balance	$ 116,174	$ 59,524