This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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+ Details

Investment in Boise Cascade Holdings LLC - Additional Information (Detail) (USD $)	6 Months Ended			3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011	Dec. 31, 2011	Jun. 30, 2012 Affiliated Entity	Jun. 25, 2011 Affiliated Entity	Dec. 31, 2004 Affiliated Entity	Jun. 30, 2012 Corporate And Other Segment	Jun. 25, 2011 Corporate And Other Segment
Investments in and Advances to Affiliates [Line Items]
Investment in Boise Cascade Holdings, L.L.C.	$ 175,000,000		$ 175,000,000			$ 175,000,000
Deferred gain on sale of investment in Boise Cascade Holdings, L.L.C.	180,000,000
Dividend accrual rate on investments in Boise Cascade Holdings, L.L.C.				8.00%
Dividend income on investments	4,137,000	3,815,000		2,100,000	1,900,000		4,100,000	3,800,000
Dividend receivable in other non-current assets	$ 42,000,000		$ 38,000,000