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Stock Compensation Plans (Narrative) (Details)
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3 Months Ended |
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Mar. 31, 2012
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ICE Plan [Member]
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Ìý |
| Performance shares granted | 312,540 |
| Restricted shares granted | 114,070 |
| Number of shares granted under the plan | 426,610 |
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Lower Limit [Member] | 2010 to 2012 Performance Period [Member]
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Ìý |
| Minimum payout ratio | 0.00% |
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Lower Limit [Member] | 2011 To 2013 And The 2012 to 2014 Performance Periods [Member]
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Ìý |
| Minimum payout ratio | 0.00% |
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Upper Limit [Member] | 2010 to 2012 Performance Period [Member]
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Ìý |
| Maximum payout ratio | 150.00% |
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Upper Limit [Member] | 2011 To 2013 And The 2012 to 2014 Performance Periods [Member]
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Ìý |
| Maximum payout ratio | 200.00% |
| X | ||||||||||
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- Definition
Share Based Goods and Nonemployee Services Transaction Valuation Method, Maximum Range of Payout Rate No definition available.
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| X | ||||||||||
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- Definition
Share Based Goods and Nonemployee Services Transaction Valuation Method, Minimum Range of Payout Rate No definition available.
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| X | ||||||||||
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- Definition
Stock Issued During Period Share Performance Stock Award Gross No definition available.
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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