Financial Instruments (Effect Of Derivatives On Consolidated Condensed Statements Of Operations And Comprehensive Income) (Details) (USD $) In Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Net gain recognized in income	$ 1,200				$ 700
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member]
Net gain recognized in income	263				536
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member] | Interest Expense [Member]
Realized gain on hedging instrument\derivative	263	[1]		[1]	536	[1]		[1]
Lumber Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Net gain recognized in income	2,363				3,000
Lumber Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Cost of Goods Sold [Member]
Realized gain on hedging instrument\derivative	253				249
Unrealized gain on derivative	$ 2,110				$ 2,751

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