Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2011 acre	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Minimum future rent on non cancelable lease due in 2013		$ 3,000,000
Minimum future rent on non cancelable lease due in 2014		3,000,000
Minimum future rent on non cancelable lease due in 2015		2,800,000
Minimum future rent on non cancelable lease due in 2016		2,700,000
Minimum future rent on non cancelable lease due in 2017		2,400,000
Timber deed sale agreement, value	55,900,000
Timber deed land owned	40,975
Percentage of buyer First Thinnings at fair market value		85.00%
Timber revenue		38,977,000	86,703,000	28,841,000
Imputed land lease revenue			1,400,000
Purchase price of First Thinnings		900,000	1,200,000
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%
Restricted stock awards granted		59,891
Anti- dilutive securities excluded from computation of diluted (loss) per share		100,000	100,000	100,000
Timber Deed
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber revenue			$ 54,500,000
Minimum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated Useful Life (in years)		3 years
Minimum | Real Estate
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated Useful Life (in years)		15 years
Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber deed sale agreement, term (in years)	20
Estimated Useful Life (in years)		30 years
Impairment analysis for development and operating properties, holding periods		13 years
Maximum | Real Estate
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated Useful Life (in years)		40 years
Maximum | Restricted stock awards
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Restricted stock awards granted		100,000