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Stockholders' Equity - Estimated Amount of Total Share-based Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013
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2013 | $ 8.4
2014 | 16.6
2015 | 11.2
2016 | 3.4
Total | $ 39.6

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- Definition Employee service share based compensation non vested awards compensation cost to be recognized in year four. + References No definition available. + Details
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- Definition Employee service share-based compensation non-vested awards compensation cost to be recognized in year one. + References No definition available. + Details
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- Definition Employee service share-based compensation non-vested awards compensation cost to be recognized in year three. + References No definition available. + Details
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- Definition Employee service share-based compensation non-vested awards compensation cost to be recognized in year two. + References No definition available. + Details
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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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