Timber Assets Schedule of Timber and Timberlands (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 acre		Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Timber and timberlands, gross	$ 558,206,053		$ 334,471,743
Timber and timberlands, accumulated depletion or amortization	15,104,816		8,745,345
Timber and timberlands, net	543,101,237		325,726,398
Timber Properties
Property, Plant and Equipment [Line Items]
Timber and timberlands, gross	258,648,037		149,859,173
Timber and timberlands, accumulated depletion or amortization	14,788,215		8,505,024
Timber and timberlands, net	243,859,822		141,354,149
Area of Land	121,612
Payments to acquire timberland	235,200,000		1,400,000	20,500,000
Timberlands
Property, Plant and Equipment [Line Items]
Timber and timberlands, gross	298,943,503		184,114,333
Timber and timberlands, accumulated depletion or amortization	0		0
Timber and timberlands, net	298,943,503		184,114,333
Mainline roads
Property, Plant and Equipment [Line Items]
Timber and timberlands, gross	614,513		498,237
Timber and timberlands, accumulated depletion or amortization	316,601		240,321
Timber and timberlands, net	297,912		257,916
Waycross - Panola properties | Timber Properties
Property, Plant and Equipment [Line Items]
Date of Acquisition	Apr. 11, 2014
Area of Land	36,320
Payments to acquire timberland	73,700,000
Satilla River property | Timber Properties
Property, Plant and Equipment [Line Items]
Date of Acquisition	Oct. 02, 2014
Area of Land	17,913
Payments to acquire timberland	34,300,000
Oglethorpe property | Timber Properties
Property, Plant and Equipment [Line Items]
Date of Acquisition	Oct. 02, 2014
Area of Land	37,663
Payments to acquire timberland	76,400,000
Beauregard property | Timber Properties
Property, Plant and Equipment [Line Items]
Date of Acquisition	Oct. 30, 2014
Area of Land	21,009
Payments to acquire timberland	38,000,000
Small property acquisitions | Timber Properties
Property, Plant and Equipment [Line Items]
Area of Land	8,707	[1]
Payments to acquire timberland	12,800,000	[1]
Purchase prices of individual acquisition	$ 20,000,000

[1] Small property acquisitions represent completed acquisitions with individual purchase prices less than $20.0 million.