Commitments And Contingencies (Future Minimum Rental Payments Under All Non-Cancelable Operating Leases) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
2017	$ 25,275
2018	20,865
2019	20,301
2020	17,308
2021	9,621
2021 and thereafter	62,163
Total minimum lease obligations	155,533
Office Space [Member]
Property Subject to or Available for Operating Lease [Line Items]
2017	3,135
2018	3,117
2019	3,064
2020	3,071
2021	2,302
2021 and thereafter	2,256
Total minimum lease obligations	16,945
Transportation equipment
Property Subject to or Available for Operating Lease [Line Items]
2017	12,119
2018	10,297
2019	9,731
2020	6,787
2021	2,166
2021 and thereafter	2,622
Total minimum lease obligations	43,722
Terminals and Tanks [Member]
Property Subject to or Available for Operating Lease [Line Items]
2017	10,021
2018	7,451
2019	7,506
2020	7,450
2021	5,153
2021 and thereafter	57,285
Total minimum lease obligations	$ 94,866