Notes and Contracts Receivable - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract receivables	$ 18,000	$ 17,800
Receivables, allowances	5,378	6,470	$ 7,110	$ 7,927
Chattel Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Chattel notes receivable, net	$ 16,500	17,600
Loans receivable, stated interest yield per annum (in percentage)	7.70%
Notes receivable, yield rate (in percentage)	20.70%
Loans receivable, amortization term (in years)	11 years
Allowance for loan and lease losses, real estate	$ 300	300
Contract Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, amortization term (in years)	4 years
Receivables, allowances	$ 700	600
Contract receivable, weighted average rate (in percentage)	16.20%
Rent Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables, allowances	$ 4,400	$ 4,500