Derivative Instruments (Effect of Derivatives on Consolidated Statements of Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Designated as Hedging Instrument | Fair Value Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain on interest rate contracts	[1]	$ 123	$ 214	$ 290	$ 456
Designated as Hedging Instrument | Cash Flow Hedging [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in other comprehensive income, net of tax (effective portion)		(226)	(490)	(228)	(654)
Designated as Hedging Instrument | Cash Flow Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss reclassified from accumulated other comprehensive income (effective portion)	[1]	(41)	$ (77)	(91)	$ (77)
Derivatives not designated as Hedging Instrument [Member] | Lumber Price Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain on lumber price contracts		3,265		3,265
Derivatives not designated as Hedging Instrument [Member] | Lumber Price Contracts [Member] | Gain On Lumber Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain on lumber price swap		$ 3,265		$ 3,265

[1] Realized gain on hedging instruments consists of net cash settlements and interest accruals on the fair value interest rate swaps during the periods. Net cash settlements are included in the supplemental cash flow information within interest, net of amounts capitalized in the Condensed Consolidated Statements of Cash Flows