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Commitments, Contingencies and Legal Proceedings - Additional Information (Detail)
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 14, 2014
USD ($)
Sep. 25, 2014
Jan. 31, 2008
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Operable_Unit
May. 15, 2015
Dec. 31, 2014
USD ($)
Commitments Contingencies And Litigation [Line Items]              
Annual payments due under operating leases         $ 13,100,000    
Aggregate contractual obligation         $ 130,100,000    
Number of operable units | Operable_Unit         5    
Upper end estimate of total past and future response costs $ 1,100,000,000            
Uncertainty premium for future response costs 100,000,000            
Estimated cost not included in final accounts 100,000,000            
Annual estimated cost rate seek by Government         $ 100,000,000    
Cost of response incurred by government         4,280,000    
Initial minimum amount of NRD assessment         176,000,000    
Initial maximum amount of NRD assessment         333,000,000    
Revised minimum amount of NRD assessment         287,000,000    
Revised maximum amount of NRD assessment         423,000,000    
Reserve for environmental liability, expected compensation payments 45,900,000            
Environmental loss contingencies 105,000,000            
Other prepaid loss contingencies for earlier settlements 59,000,000            
Increase in remediation activities reserve         10,000,000    
Reserve for Environmental liabilities, current portion         $ 12,544,000   $ 1,075,000
Maximum estimated percentage of discharge         27.00%    
Whiting Litigation [Member]              
Commitments Contingencies And Litigation [Line Items]              
Remaining costs and damages amount         $ 33,000,000    
2016 Work Plan [Member]              
Commitments Contingencies And Litigation [Line Items]              
Increase in remediation activities reserve       $ 10,000,000      
NCR and GP [Member] | Whiting Litigation [Member]              
Commitments Contingencies And Litigation [Line Items]              
Costs and damages amount         67,000,000    
NCR and GP [Member] | 2016 Work Plan [Member] | Whiting Litigation [Member]              
Commitments Contingencies And Litigation [Line Items]              
Annual estimated cost rate seek by Government         $ 100,000,000    
NCR [Member]              
Commitments Contingencies And Litigation [Line Items]              
Percentage of apportion liability on cost           28.00%  
Minimum [Member]              
Commitments Contingencies And Litigation [Line Items]              
Period over which estimated cost to be incurred         2 years    
Minimum [Member] | Appvion [Member]              
Commitments Contingencies And Litigation [Line Items]              
Litigation claim amount         $ 170,000,000    
Maximum [Member]              
Commitments Contingencies And Litigation [Line Items]              
Estimated cost related to Fox River matter         $ 175,000,000    
Period over which estimated cost to be incurred         3 years    
OU2-5 [Member]              
Commitments Contingencies And Litigation [Line Items]              
Estimated future cost of remediation         $ 9,700,000    
Estimated future cost of work yet to be done 500,000,000            
NCR costs and damages percentage   100.00%          
OU2-5 [Member] | Whiting Litigation [Member]              
Commitments Contingencies And Litigation [Line Items]              
NCR costs and damages percentage     100.00%        
OU2-5 [Member] | 2015 Work Plan [Member]              
Commitments Contingencies And Litigation [Line Items]              
Annual remediation cost rate seek by Government         $ 100,000,000    
OU1 [Member]              
Commitments Contingencies And Litigation [Line Items]              
Estimated future cost of work yet to be done $ 100,000,000