Receivables - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	$ 24,847	$ 39,278
Due period of notes receivable as secured by deed of trust	3 years
Loan secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	3,574	7,610
Principal amount after reorganization	33,900
Interest accrue percentage till year three	9.00%
Interest accrue percentage year four	10.00%
Interest accrue percentage year five	12.00%
Forgiven interest rate	6.25%
Principal amount of loan received	11,304	14,315
Interest amount of loan received	634	1,872
Outstanding principal balance	4,394
Other loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	1,737	7,987
Cibolo Canyons Project [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Area of Land	33
Cibolo Canyons Project [Member] | Prime Rate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Basis Spread on Variable Rate	1.00%
Cibolo Canyons Project [Member] | Other loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	6,160
Real Estate Property Sale Price	7,700
Real Estate Project - Colorado [Member] | Other loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	824
San Joaquin River [Member] | Other loans secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and Notes Receivables	$ 550