Estimated Future Benefit Payments for Defined Benefit Pension and Postretirement Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Defined benefit pension plans
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Benefit payments - 2014	$ 32,289
Benefit payments - 2015	36,071
Benefit payments - 2016	42,815
Benefit payments - 2017	34,583
Benefit payments - 2018	35,934
Benefit payments - 2019 - 2023	203,523
Other Postretirement Benefit Plans
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Benefit payments - 2014	2,700
Benefit payments - 2015	2,600
Benefit payments - 2016	2,500
Benefit payments - 2017	2,500
Benefit payments - 2018	2,500
Benefit payments - 2019 - 2023	$ 11,100

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Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ 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 (f)

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

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

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