Financial Instruments (Effect Of Derivatives On Consolidated Condensed Statements Of Operations And Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments, gain (loss) recognized in income, net	$ 213		$ 255		$ 646		$ 791
Derivatives designated as hedging instruments [Member] | Interest expense [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain (loss) on hedging instrument\derivative	213	[1]	255	[1]	646	[1]	791	[1]
Derivatives not designated as hedging instruments [Member] | Lumber contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments, gain (loss) recognized in income, net	0		1,954		(876)		4,954
Derivatives not designated as hedging instruments [Member] | Cost of goods sold [Member] | Lumber contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain (loss) on hedging instrument\derivative	0		304		(396)		553
Unrealized gain (loss) on derivative	$ 0		$ 1,650		$ (480)		$ 4,401

[1] 1) Realized gain on hedging instrument consists of net cash settlements and interest accruals on the interest rate swaps during the periods.