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Accumulated Other Comprehensive Income - Schedule of Amounts Reclassifications Out of Accumulated Other Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold $ (405,943) $ (348,915)
Selling, general and administrative (33,551) (33,487)
Income tax provision (3,110) (4,840)
Reclassifications Out of Accumulated Other Comprehensive Income [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Net of tax 2,640 3,878
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Before tax 3,674 6,063
Income tax provision (1,393) (2,284)
Net of tax 2,281 3,779
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member] | Prior Service Costs [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 548 613
Selling, general and administrative 186 161
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Pension Plan Items [Member] | Actuarial Losses [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 2,196 4,114
Selling, general and administrative 744 1,175
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Before tax 57 77
Income tax provision (22) (29)
Net of tax 35 48
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Prior Service Costs [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold (59) (100)
Selling, general and administrative (13) (25)
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member] | Actuarial Losses [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 106 155
Selling, general and administrative 23 47
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | (Gains) Losses on Cash Flow Hedges [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 449 70
Income tax provision (125) (19)
Net of tax $ 324 $ 51