Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	$ 10,935,000
Operating Leases, Future Minimum Payments, Due in Two Years	10,441,000
Operating Leases, Future Minimum Payments, Due in Three Years	9,511,000
Operating Leases, Future Minimum Payments, Due in Four Years	8,258,000
Operating Leases, Future Minimum Payments, Due in Five Years	7,884,000
Operating Leases, Future Minimum Payments, Due Thereafter	57,022,000
Operating Leases, Future Minimum Payments Due	104,051,000
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	7,300,000		7,200,000	7,600,000
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	7,519,000	[1]
Operating Leases, Future Minimum Payments, Due in Two Years	7,498,000	[1]
Operating Leases, Future Minimum Payments, Due in Three Years	7,031,000	[1]
Operating Leases, Future Minimum Payments, Due in Four Years	6,812,000	[1]
Operating Leases, Future Minimum Payments, Due in Five Years	6,715,000	[1]
Operating Leases, Future Minimum Payments, Due Thereafter	54,319,000	[1]
Operating Leases, Future Minimum Payments Due	89,894,000	[1]
Buildings, Machinery and Equipment [Member]
Leases, Operating [Abstract]
Operating Leases, Rent Expense, Net	3,300,000		3,700,000	3,400,000
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	3,416,000
Operating Leases, Future Minimum Payments, Due in Two Years	2,943,000
Operating Leases, Future Minimum Payments, Due in Three Years	2,480,000
Operating Leases, Future Minimum Payments, Due in Four Years	1,446,000
Operating Leases, Future Minimum Payments, Due in Five Years	1,169,000
Operating Leases, Future Minimum Payments, Due Thereafter	2,703,000
Operating Leases, Future Minimum Payments Due	$ 14,157,000

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