Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	$ 11,655,000
2014	10,272,000
2015	9,072,000
2016	8,650,000
2017	7,851,000
Thereafter through 2036	50,305,000
Operating Leases, Future Minimum Payments Due	97,805,000
Timber Properties [Member]
Leases, Operating [Abstract]
Description of Lessee Leasing Arrangements, Operating Leases	The Company also has long-term leases on certain timberlands in the Southern U.S. These leases typically have initial terms of approximately 30 to 65 years, with renewal provisions in some cases. Such leases are generally non-cancellable and require minimum annual rental payments.
Operating Leases of Lessee, Contingent Rentals, Description of Variable Rate Basis	The majority of timberland leases are subject to increases or decreases based on either the Consumer Price Index or Producer Price Index.
Expenditures for Long-Term Leases and Deeds on Timberlands	8,000,000		7,300,000	7,200,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	7,822,000	[1]
2014	7,336,000	[1]
2015	7,104,000	[1]
2016	7,007,000	[1]
2017	6,670,000	[1]
Thereafter through 2036	48,259,000	[1]
Operating Leases, Future Minimum Payments Due	84,198,000	[1]
Buildings, Machinery and Equipment [Member]
Leases, Operating [Abstract]
Operating Leases, Rent Expense, Net	3,900,000		3,300,000	3,700,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013	3,833,000
2014	2,936,000
2015	1,968,000
2016	1,643,000
2017	1,181,000
Thereafter through 2036	2,046,000
Operating Leases, Future Minimum Payments Due	$ 13,607,000

[1] The majority of timberland leases are subject to increases or decreases based on either the Consumer Price Index or Producer Price Index.