Compensation Plans Outstanding Longer Term Incentive Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Outstanding Long Term Incentive Awards [Line Items]
Target Shares Issuable as Long Term Incentive Awards	$ 126,000	$ 107,642
Maximum Shares Issuable as Long Term Incentive Awards	157,250	141,577
Unrecognized Compensation Cost - Long Term Incentives	$ 1,454,417	$ 745,873
Share-based Compensation Arrangement By Share-based Payment Award, Grants In Period, Weighted Average Grant Date Fair Value	$ 19,210	$ 16,840