Leases Operating Lease, Other Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Total lease expense	$ 12,889	$ 12,558
Current lease liability	26,699		$ 26,221
Long-term lease liability	139,218		144,023
Right-of-use asset	165,512		171,868
N/A [Member]
Related Party Transaction [Line Items]
Total lease expense	5,990	5,649
Current lease liability	14,882		15,136
Long-term lease liability	79,288		81,508
Right-of-use asset	93,766		98,268
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Total lease expense	6,899	$ 6,909
Current lease liability	11,817		11,085
Long-term lease liability	59,930		62,515
Right-of-use asset	$ 71,746		$ 73,600