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Pension Plans - Weighted-Average Asset Allocations of Pension Plan Assets (Detail)	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	63.00%	60.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	32.00%	37.00%
Cash and Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average asset allocations of pension plan assets	5.00%	3.00%

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

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

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