Restructuring, Discontinued Operations, and Other (Details) (USD $)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended								3 Months Ended	0 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Impairment of long-lived assets	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Impairment of long-lived assets	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Severance and benefit continuation costs	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Severance and benefit continuation costs	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Severance and benefit continuation costs	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Severance and benefit continuation costs	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Other associated costs, net	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Other associated costs, net	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Other associated costs, net	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Other associated costs, net	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Contract termination	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Other	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Inventory and spare parts write-downs	Sep. 30, 2012 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Inventory and spare parts write-downs	Sep. 30, 2013 Sale of Print & Color brands and Specialty paper business and Closure of Brainerd mill and Brokaw mill Accelerated depreciation on long-lived assets	Sep. 30, 2012 Sale of Print & Color brands	Sep. 30, 2012 Closure of Brokaw paper mill	Jun. 26, 2013 Sale of specialty paper business	Sep. 30, 2013 Sale of specialty paper business
Restructuring and Discontinued Operations
Net cash proceeds, subject to certain post-closing adjustments			$ 105,067,000	$ 20,837,000																							$ 105,000,000
Impairment charges																												63,700,000
Quoted market prices																												0
Amount of credit generated related to pension and other postretirement plan settlements, curtailments, and special termination benefits																												5,900,000
Pre-tax gain on sale and disposal of discontinued operations																									12,500,000	200,000
Proceeds from sale and disposal of long-lived assets																										4,800,000
Amount of provision recognized																												0
Current assets of discontinued operations:
Receivables, net	1,900,000		1,900,000
Inventories	754,000		754,000
Other current assets	7,911,000		7,911,000
Assets of discontinued operations - current	10,565,000		10,565,000
Total assets of discontinued operations	10,565,000		10,565,000
Current liabilities of discontinued operations
Accounts payable	269,000		269,000
Accrued and other liabilities	1,154,000		1,154,000		833,000
Liabilities of discontinued operations - current	1,423,000		1,423,000		833,000
Non-current liabilities of discontinued operations:
Other non-current liabilities	1,700,000		1,700,000
Total liabilities of discontinued operations	3,123,000		3,123,000		833,000
Certain condensed consolidated statements of operations information for discontinued operations
Net sales	1,644,000	115,668,000	209,756,000	419,966,000
(Loss) earnings from discontinued operations before income taxes	(1,527,000)	(7,112,000)	(107,971,000)	6,310,000
(Credit) provision for income taxes	(709,000)	(3,404,000)	(41,049,000)	1,381,000
(Loss) earnings from discontinued operations, net of taxes	(818,000)	(3,708,000)	(66,922,000)	4,929,000
Net (loss) earnings per share - basic and diluted (in dollars per share)	$ (0.02)	$ (0.08)	$ (1.35)	$ 0.10
Closure costs						1,828,000	414,000	114,840,000	6,695,000	63,712,000	2,075,000	749,000	89,000	3,127,000	1,819,000	1,079,000	325,000	5,573,000	1,816,000			6,712,000	985,000	35,716,000
Liabilities for restructuring expenses
Balance at the beginning of the period								48,000						26,000							22,000
Reserve/ Provisions								11,106,000						3,127,000						2,665,000	5,314,000
Payments/ Usage								(7,946,000)						(2,238,000)						(372,000)	(5,336,000)
Balance at the end of the period						$ 3,208,000		$ 3,208,000				$ 915,000		$ 915,000						$ 2,293,000