Notes Receivable - Components of Notes Receivable (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	52,444	$ 72,218	$ 60,378
Other notes	50	1,034
Tax Increment Financing Bonds ("TIF Bonds")	3,751	5,086
Notes receivable, net	56,245	$ 78,338	$ 68,718
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity Date	September 2011 to June 2023
Loans Receivable [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	5.70%
Loans Receivable [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	14.00%
Other Notes [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity Date	September 2017
Interest Rate	12.00%
Tax Increment Financing Bonds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity Date	April 2018 to July 2026
Tax Increment Financing Bonds [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	5.60%
Tax Increment Financing Bonds [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	8.50%