Notes Receivable - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Net	$ 22,800,000
Loans Receivable Held-for-sale, Net			7,700,000
Home loans repossessed	1,724,000	3,506,000
Business Combinations, Acquired Receivables, Current Value	14,700,000
Certain Loans Acquired in Transfer, Accretable Yield	0.27		0.21
Contract receivables	16,700,000		16,100,000
Contract Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, amortization term	4 years
Proceeds from receivables repaid	5,500,000	5,400,000
Additional loan to customers	5,500,000	4,700,000
Provision for uncollectible receivable	700,000		700,000
Contracts Receivable, yield interest at a stated per annum average	16.00%
Chattel Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Home loans repossessed	1,700,000	3,500,000
Loans receivable, stated interest yield per annum	7.80%
Notes Receivable Yield Rate	21.40%
Loans receivable, amortization term	13 years
Notes receivable, allowance	400,000		400,000
Proceeds from receivables repaid	3,700,000	4,200,000
Additional loan to customers	2,300,000	500,000
Segment, Continuing Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Net			25,000,000
Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Net			$ 6,500,000