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Stock Based Compensation (Details 6) (Deferred Performance Shares, USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Deferred Performance Shares |
Deferred Compensation Plan |
Number of common stock deferred into the rabbi trust (in shares) | 534,174
Number of shares sold | 0
Increase in rabbi trust deferred compensation liability | $ (9.3)

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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition Number of share instruments newly issued under a share-based compensation 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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