Pension and Other Postretirement Benefits - Summary of Changes in the Fair Value of the Level 3 Plan Assets for U.S. and Foreign Pension Plans (Detail) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended			12 Months Ended
Dec. 31, 2013 U.S. Pension Benefits [Member] USD ($)	Dec. 31, 2012 U.S. Pension Benefits [Member] USD ($)	Dec. 31, 2013 U.S. Pension Benefits [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 U.S. Pension Benefits [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2013 U.S. Pension Benefits [Member] Hedge and Absolute Return Funds [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 U.S. Pension Benefits [Member] Hedge and Absolute Return Funds [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2013 U.S. Pension Benefits [Member] Managed Funds [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 U.S. Pension Benefits [Member] Managed Funds [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2013 Foreign Pension Benefits [Member] USD ($)	Dec. 31, 2012 Foreign Pension Benefits [Member] USD ($)	Dec. 31, 2013 Foreign Pension Benefits [Member] GBP (£)	Dec. 31, 2012 Foreign Pension Benefits [Member] GBP (£)	Dec. 31, 2013 Foreign Pension Benefits [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)	Dec. 31, 2012 Foreign Pension Benefits [Member] Significant Unobservable Inputs (Level 3) [Member] USD ($)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, Beginning balance	$ 140,218	$ 133,403	$ 40,822	$ 36,554	$ 6,490	$ 5,940	$ 30,064	$ 29,280	$ 41,875	$ 36,436	£ 29,315	£ 25,774	$ 9,031	$ 3,324
Acquisitions					2,225	0	0	0					1,100	5,191
Withdrawals					(1,320)	0	(2,070)	(1,919)					0	(87)
Realized gain					563		451						0
Change in net unrealized gain	20,806	(17,289)			431	550	3,988	2,703	823	(5,239)			644	333
Other, primarily impact from changes in foreign currency exchange rates	0	0			0	0	0	0	1,098	1,734			266	270
Fair value of plan assets, Ending balance	$ 164,085	$ 140,218	$ 40,822	$ 36,554	$ 8,389	$ 6,490	$ 32,433	$ 30,064	$ 48,536	$ 41,875	£ 29,315	£ 25,774	$ 11,041	$ 9,031

Defined benefit plan realized gains losses.

No definition available.

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- Definition

Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

-URI http://asc.fasb.org/extlink&oid=6514294

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Glossary Gain or Loss

-URI http://asc.fasb.org/extlink&oid=6749293

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- Definition

Fair value of assets transferred into (out of) a defined benefit pension plan.

+ References

No definition available.

+ Details

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- Definition

The amount of increase in the plan assets attributed to a business combination.

+ References

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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- Definition

The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

+ References

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