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Stock-based Compensation (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Share-based compensation expense due to accelerated vesting of restricted stock units and stock options | $ 5.1 |
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period |  | 0.8
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value |  | $ 12.71

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- Definition Represents charges recorded during the period for the accelerated vesting of restricted stock units (RSU's) and stock options as a result of a triggering event that caused the RSU's and stock options to vest immediately. + References No definition available. + Details
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- Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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Period Type: | duration