Inventory (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Inventory, Net [Abstract]
Finished goods	$ 115,270,000	[1]	$ 103,568,000	[1]
Work in progress	3,555,000		4,446,000
Raw materials	17,661,000		17,602,000
Manufacturing and maintenance supplies	2,332,000		2,350,000
Total inventory	138,818,000		127,966,000
HBU Real Estate Held for Sale
HBU Real Estate Held for Sale	$ 6,300,000		$ 4,900,000

[1] Includes $6.3 million and $4.9 million of HBU real estate held for sale at December 31, 2013 and 2012, respectively.