Description of Business and Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012 acre	Jun. 30, 2011
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Land owned (in acres)				571,000
Minimum projected price appreciation over time				0.00%
Maximum projected price appreciation over time				10.00%
Estimated developer profit based on development costs				20.00%
Future holding period of operating properties (in years)				13 years
Timber deed sale agreement, value			$ 55,900,000
Percentage of buyer First Thinnings at fair market value				85.00%
Timber deed revenue	9,731,000	8,166,000		19,226,000	70,790,000
Purchase price of First Thinnings	100,000	600,000		300,000	600,000
Timber Deed
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber deed land owned			40,975
Timber deed revenue		54,500,000			54,500,000
Imputed land lease revenue		$ 1,400,000			$ 1,400,000
Minimum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Length of estimated development and selling periods				4
Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Length of estimated development and selling periods				13
Maximum | Timber Deed
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber deed sale agreement, term (in years)			20