Inventories (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012
Effect of LIFO Inventory Liquidation on Income	$ 0.1
Inventory Disclosure [Abstract]
Finished products	109.6	142.7
Supplies	9.5	12.8
LIFO reserve	(0.6)	(1.0)
Total	163.6	209.8
Logs [Member]
Inventory Disclosure [Abstract]
Logs	26.5	37.6
Other Raw Materials [Member]
Inventory Disclosure [Abstract]
Logs	$ 18.6	$ 17.7