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Basis of Presentation Share-based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 4,609 |
Payments Related to Tax Withholding for Share-based Compensation | $ 6,278 | $ 1,510
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures | 956,600 | 484,680
Performance Share Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Exercised | 560,936 | 0
Employee Stock Option [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Exercised | 61,624 | 0
Restricted Stock [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Exercised | 334,040 | 484,680

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