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Accumulated Other Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]        
Costs of products sold $ (359,826) $ (345,477) $ (1,052,626) $ (1,056,209)
Selling, general and administrative (33,399) (35,747) (100,484) (104,796)
Income tax provision (4,281) (1,401) (9,944) (6,459)
Net income 12,105 19,601 17,994 37,734
Reclassifications Out of Accumulated Other Comprehensive Income [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Net income 2,304 2,656 5,594 7,215
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Costs and Expenses 3,786 3,967 11,331 11,903
Income tax provision (1,362) (1,503) (4,075) (4,511)
Net income 2,424 2,464 7,256 7,392
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 532 506 1,592 1,519
Selling, general and administrative 176 168 528 504
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Pension Benefits [Member] | Actuarial Losses [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Costs of products sold 2,290 2,450 6,852 7,350
Selling, general and administrative 788 843 2,359 2,530
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Costs and Expenses (139) (234) (419) (703)
Income tax provision   89   268
Net income (139) (145) (419) (435)
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plans [Member] | Prior Service Costs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Costs of products sold (37) (37) (112) (112)
Selling, general and administrative (8) (8) (24) (24)
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Amortization of Deferred Benefit Other Plans [Member] | Actuarial Losses [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Costs of products sold (77) (156) (233) (467)
Selling, general and administrative (17) (33) (50) (100)
Reclassifications Out of Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Accumulated Net (Gain) Loss from Cash Flow Hedges Attributable to Parent        
Defined Benefit Plan Disclosure [Line Items]        
Costs of products sold 29 347 (1,687) 264
Income tax provision (10) (10) 444 (6)
Net income $ 19 $ 337 $ (1,243) $ 258