Financial Instruments (Effect Of Derivatives On Consolidated Condensed Statements Of Operations And Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Derivatives designated as hedging instruments [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income	$ 241		$ 218		$ 487		$ 433
Derivatives designated as hedging instruments [Member] | Interest expense [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain on hedging instrument	241	[1]	218	[1]	487	[1]	433	[1]
Derivatives not designated as hedging instruments [Member] | Lumber contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income	0		(933)		0		(876)
Derivatives not designated as hedging instruments [Member] | Cost of goods sold [Member] | Lumber contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss on derivative	0		(185)		0		(480)
Realized loss on derivative	$ 0		$ (748)		$ 0		$ (396)

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