Share-Based Compensation (Multi-Year Outperformance Plan Agreement) (Details) - New Multi-Year Outperformance Plan - Performance Shares	12 Months Ended
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, award vesting rights	33.33%
Performance Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute Component: 4% of any excess Total Return if total stockholder return attained above an absolute hurdle measured from the beginning of such period:	21.00%
100% will be earned if total stockholder return achieved is at least:	18.00%
50% will be earned if total stockholder return achieved is:	0.00%
0% will be earned if total stockholder return achieved is less than:	0.00%
Annual Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute Component: 4% of any excess Total Return if total stockholder return attained above an absolute hurdle measured from the beginning of such period:	7.00%
100% will be earned if total stockholder return achieved is at least:	6.00%
50% will be earned if total stockholder return achieved is:	0.00%
0% will be earned if total stockholder return achieved is less than:	0.00%
Interim Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute Component: 4% of any excess Total Return if total stockholder return attained above an absolute hurdle measured from the beginning of such period:	14.00%
100% will be earned if total stockholder return achieved is at least:	12.00%
50% will be earned if total stockholder return achieved is:	0.00%
0% will be earned if total stockholder return achieved is less than:	0.00%
Relative Component \| Excess Return, Above Peer Group
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized, percentage of benchmark	4.00%
Relative Component \| Cumulative Return, Above Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded as a percentage of maximum	100.00%
Relative Component \| Cumulative Return, Above Threshold \| Minimum \| Performance Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	0.00%
Relative Component \| Cumulative Return, Above Threshold \| Minimum \| Annual Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	0.00%
Relative Component \| Cumulative Return, Above Threshold \| Minimum \| Interim Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	0.00%
Relative Component \| Cumulative Return, Above Threshold \| Maximum \| Performance Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	18.00%
Relative Component \| Cumulative Return, Above Threshold \| Maximum \| Annual Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	6.00%
Relative Component \| Cumulative Return, Above Threshold \| Maximum \| Interim Period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return percentage threshold	12.00%
Relative Component \| Cumulative Return, Equal to Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded as a percentage of maximum	50.00%
Relative Component \| Cumulative Return, Below Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares awarded as a percentage of maximum	0.00%
Absolute Component \| Excess Return, Above Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized, percentage of benchmark	4.00%

Share-based Compensation Arrangement by Share-based Payment Award, Return Percentage Threshold

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Share-based Compensation Arrangement by Share-based Payment Award, Shares Awarded as a Percentage of Maximum

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Share-based Compensation Arrangement by Share-based Payment Award, Relative Component, Fifty Percent Funding Benchmark, Performance Target Percentage

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+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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