v3.19.2
Fair Value Fair Value (Narrative) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
bbl
Mar. 31, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
bbl
Jun. 30, 2018
USD ($)
Derivative [Line Items]          
Gain (Loss) on Disposition of Other Assets $ 4,646   $ 0 $ 26,434 $ 0
Energy Related Derivative [Member]          
Derivative [Line Items]          
Derivative, Nonmonetary Notional Amount | bbl 30,000     30,000  
BridgeTex [Member]          
Derivative [Line Items]          
Gain (Loss) on Disposition of Other Assets   $ 11,000      
BridgeTex [Member] | Indemnification Agreement [Member]          
Derivative [Line Items]          
Guarantees, Fair Value Disclosure   $ 5,000