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Compensation Plans Outstanding Longer Term Incentive Awards (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Outstanding Long Term Incentive Awards [Line Items]    
Target Shares Issuable as Long Term Incentive Awards $ 95,694 $ 113,903
Maximum Shares Issuable as Long Term Incentive Awards 117,681 142,292
Unrecognized Compensation Cost - Long Term Incentives $ 1,928,804 $ 1,139,778
Share-based Compensation Arrangement By Share-based Payment Award, Grants In Period, Weighted Average Grant Date Fair Value $ 25,260 $ 19,210