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Stock-Based Compensation Plans - Additional Information 1 (Detail)	3 Months Ended
	Mar. 31, 2014 Plans	Mar. 31, 2014 Stock Appreciation Rights (SARs) [Member]	Dec. 31, 2013 Stock Appreciation Rights (SARs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Active equity-based stock plans	2
Number of stock option outstanding		2,445,907	2,582,074

X

- Definition

Number of active stock based plans.

+ References

No definition available.

+ Details

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X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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