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Additional Information on Non Vested Restricted Stock (Detail) (Restricted Stock Awards, USD $) In Millions, unless otherwise specified | Dec. 31, 2013 Y
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Restricted Stock Awards |
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |
Aggregate intrinsic value | $ 35.5
Weighted-average remaining vesting period | 1.94
Unrecognized compensation cost | $ 22.5

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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