Derivative Instruments (Effect of Derivatives on Consolidated Statements of Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on lumber price swap	[1]		$ (3,066)		$ 199
Interest expense, net		$ 10,109	7,336	$ 25,125	19,654
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain (loss) on interest rate contracts	[2]	(52)	76	(138)	366
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income, net of tax		1,330	(30)	1,394	(258)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest rate contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss reclassified from accumulated other comprehensive income	[2]	$ (261)	(30)	$ (456)	(121)
Derivatives not designated as Hedging Instrument [Member] | Lumber Price Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized gain on lumber price swap			986		986
Net gain (loss) on lumber price contracts			(2,081)		1,185
Derivatives not designated as Hedging Instrument [Member] | Lumber Price Contracts [Member] | Gain (Loss) on Lumber Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on lumber price swap			$ (3,067)		$ 199

[1] Includes change in unrealized (gain) loss and $1 million in cash settlements.

[2] Realized gain (loss) on hedging instruments consist of net cash settlements and interest accruals on 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