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Accumulated Other Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold $ (345,041) $ (367,429)
Selling, general and administrative (31,858) (31,272)
Income tax provision 5,068 4,935
Net income 16,168 13,925
Reclassifications Out of Accumulated Other Comprehensive Income [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Net income 2,071 2,658
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Costs and Expenses 3,728 5,266
Income tax provision (1,413) (2,000)
Net income 2,315 3,266
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member] | Prior Service Costs [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 503 567
Selling, general and administrative 171 193
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member] | Actuarial Losses [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold 2,281 3,366
Selling, general and administrative 773 1,140
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plan Items [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Costs and Expenses (96) 30
Income tax provision 38 (10)
Net income (58) 20
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 (37) (57)
Selling, general and administrative (8) (13)
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 (42) 82
Selling, general and administrative (9) 18
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Gains on Cash Flow Hedges [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Costs of products sold (298) (873)
Income tax provision 112 245
Net income $ (186) $ (628)