Financial Instruments (Fair Values Of Derivative Instruments) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Other non-current assets [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Assets	$ 2,400
Other non-current assets [Member] | Interest rate contracts [Member] | Derivatives designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Assets	2,415	62
Lumber contracts [Member] | Receivables, net [Member] | Derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Assets	1,747	0
Other long-term obligations [Member] | Interest rate contracts [Member] | Derivatives designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Liabilities	0	278
Lumber contracts [Member] | Accrued liabilities [Member] | Derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Liabilities	0	2,876
Derivatives designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Assets	2,415	62
Fair Value of Derivative Liabilities	0	278
Derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Fair Value of Derivative Assets	1,747	0
Fair Value of Derivative Liabilities	$ 0	$ 2,876