Notes Receivable - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 16.8	$ 17.6
Contract receivables	$ 17.3	17.8
Chattel Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, stated interest yield per annum	7.80%
Notes receivable yield rate	20.50%
Weighted average remaining amortization period	11 years
Notes receivable, allowance		0.3
Contract Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average remaining amortization period	4 years
Provision for uncollectible receivable	$ 0.7	$ 0.7
Contracts Receivable, yield interest at a stated per annum average	16.50%