Notes Receivable - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable Held-for-sale, Net	$ 6,500,000		$ 7,700,000
Home loans repossessed	1,186,000	3,993,000
Business Combinations, Acquired Receivables, Current Value	22,100,000
Contract receivables	16,100,000		16,100,000
Contract Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, amortization term	4 years
Proceeds from receivables repaid	3,800,000	3,700,000
Additional loan to customers	3,300,000	2,600,000
Provision for uncollectible receivable	600,000		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	1,200,000	4,000,000
Loans receivable, stated interest yield per annum	7.80%
Notes Receivable Yield Rate	18.60%
Loans receivable, amortization term	13 years
Notes receivable, allowance	400,000		400,000
Proceeds from receivables repaid	2,600,000	2,900,000
Additional loan to customers	1,100,000	300,000
Segment, Continuing Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Net	$ 23,100,000		$ 25,000,000