Summary Of Significant Accounting Policies Summary of Significant Accounting Policies (Reclassification Adjustment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Transportation and terminals revenue	$ 1,544,746	$ 1,459,267	$ 1,188,452
Operating	$ 525,902	500,901	396,194
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Transportation and terminals revenue		1,402,638	1,138,328
Operating		444,272	346,070
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Transportation and terminals revenue		56,629	50,124
Operating		$ 56,629	$ 50,124