v3.19.3
Leases Operating Lease, Other Disclosure (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]      
Fixed lease cost $ 7,400 $ 22,326  
Short-term lease cost 405 1,215  
Variable lease cost 1,009 2,041  
Total lease cost 8,814 25,582  
Current lease liability 22,997 22,997 $ 0
Long-term lease liability 135,689 135,689 0
Right-of-use asset $ 162,463 162,463 $ 0
Operating cash flows from operating leases   $ 25,959  
Weighted average remaining lease term (years) 7 years 7 years  
Weighted-average discount rate 4.10% 4.10%  
Third Party Leases      
Related Party Transaction [Line Items]      
Fixed lease cost $ 4,792 $ 14,375  
Short-term lease cost 405 1,215  
Variable lease cost 1,009 2,041  
Total lease cost 6,206 17,631  
Current lease liability 14,925 14,925  
Long-term lease liability 83,417 83,417  
Right-of-use asset $ 102,119 102,119  
Operating cash flows from operating leases   $ 17,990  
Weighted average remaining lease term (years) 6 years 6 years  
Weighted-average discount rate 3.90% 3.90%  
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member] | Related Party Leases      
Related Party Transaction [Line Items]      
Fixed lease cost $ 2,608 $ 7,951  
Short-term lease cost 0 0  
Variable lease cost 0 0  
Total lease cost 2,608 7,951  
Current lease liability 8,072 8,072  
Long-term lease liability 52,272 52,272  
Right-of-use asset $ 60,344 60,344  
Operating cash flows from operating leases   $ 7,969  
Weighted average remaining lease term (years) 9 years 9 years  
Weighted-average discount rate 4.30% 4.30%