Significant Accounting Policies - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2011 acre	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Minimum future rent on non cancelable lease due in 2014		$ 2,500,000
Minimum future rent on non cancelable lease due in 2015		2,300,000
Minimum future rent on non cancelable lease due in 2016		2,300,000
Minimum future rent on non cancelable lease due in 2017		2,200,000
Minimum future rent on non cancelable lease due in 2018		2,200,000
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		35,450,000	38,977,000	86,703,000
Purchase price of First Thinnings		200,000	900,000	1,200,000
Gross unrealized losses		2,213,000
Minimum projected price appreciation over time		0.00%
Maximum projected price appreciation over time		5.00%
Estimated developer profit based on development costs		20.00%
Timber holdings valuation sample		20.00%
Capitalized indirect costs incurred		700,000
Mill closures due to economic reasons
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Period for monetary damages would be due from third party		1 year
Timber Deed
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber revenue				54,500,000
Imputed land lease revenue				1,400,000
Minimum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Discount rate		10.00%
Estimated useful life (in years)		3 years
Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Timber deed sale agreement, term (in years)	20 years
Discount rate		20.00%
Capitalized indirect costs incurred			$ 100,000
Estimated useful life (in years)		30 years
Real Estate [Member] | Minimum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated useful life (in years)		5 years
Real Estate [Member] | Maximum
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated useful life (in years)		40 years