Finance Receivables - Special Product (New Neighbor Guaranty program) - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Unit Association	Dec. 31, 2015 USD ($) Unit Association
Accounts Notes And Loans Receivable [Line Items]
Recoveries on collection of assessments in excess of cost	$ 143,106	$ 345,686
Special Product [Member]
Accounts Notes And Loans Receivable [Line Items]
Delinquent assessments maximum due period purchases basis	48 months
Maximum future contingent payments	$ 602,000
Finance receivables outstanding	$ 492,000	$ 716,000
Number of associations | Association	33	32
Number of units covered | Unit	152	175