Restructuring Charges - Charges Incurred Related to Shutdown (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended 27 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Restructuring and Related Cost [Abstract]                        
Restructuring charges $ 134,500 $ 0 $ 0 $ 0 $ 100 $ 100 $ 200 $ 1,000 $ 134,486 $ 1,378 $ 102,404 $ 103,782
Property and equipment impairment                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 88,728 0 66,521 66,521
Severance and benefit costs                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 26,812 688 19,373 20,061
Write-off of related spare parts and inventory                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 13,876 0 6,934 6,934
Trademark Impairment [Member]                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                   0 3,693 3,693
Write-off of purchase obligations and commitments                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 1,531 (594) 2,420 1,826
Other miscellaneous costs                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 3,539 1,284 3,463 4,747
Salary And Benefit [Member]                        
Restructuring and Related Cost [Abstract]                        
Restructuring charges                 $ 1,000 $ 500