Accumulated Other Comprehensive Income - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	$ 367,429us-gaap_CostOfGoodsSold	$ 405,943us-gaap_CostOfGoodsSold
Selling, general and administrative	31,272	33,551
Income tax provision	4,935us-gaap_IncomeTaxExpenseBenefit	3,110us-gaap_IncomeTaxExpenseBenefit
Reclassifications Out of Accumulated Other Comprehensive Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Net of tax	2,658	2,640
Reclassifications Out of Accumulated Other Comprehensive Income [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Before tax	5,266	3,674
Income tax provision	(2,000)	(1,393)
Net of tax	3,266	2,281
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	567	548
Selling, general and administrative	193	186
Reclassifications Out of Accumulated Other Comprehensive Income [Member] \| Pension Benefits [Member] \| Actuarial Losses [Member]
Defined Benefit Plan Disclosure [Line Items]
Costs of products sold	3,366	2,196
Selling, general and administrative	1,140	744
Reclassifications Out of Accumulated Other Comprehensive Income [Member] \| Amortization of Deferred Benefit Other Plan Items [Member]
Defined Benefit Plan Disclosure [Line Items]
Before tax	30	57
Income tax provision	(10)	(22)
Net of tax	20	35
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	(57)	(59)
Selling, general and administrative	(13)	(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	82	106
Selling, general and administrative	18	23
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	(873)	449
Income tax provision	245	(125)
Net of tax	$ (628)	$ 324

Total costs related to goods produced and sold during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

+ Details

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 4

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34747878&loc=d3e3636-108311

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