Leases Operating Lease, Other Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Total lease expense	$ 13,649	$ 12,473	$ 39,726	$ 37,048
Current lease liability	27,177		27,177		$ 26,221
Long-term lease liability	121,764		121,764		144,023
Right-of-use asset	152,082		152,082		171,868
N/A [Member]
Related Party Transaction [Line Items]
Total lease expense	6,474	6,206	18,173	17,631
Current lease liability	15,721		15,721		15,136
Long-term lease liability	67,323		67,323		81,508
Right-of-use asset	86,185		86,185		98,268
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Total lease expense	7,175	$ 6,267	21,553	$ 19,417
Current lease liability	11,456		11,456		11,085
Long-term lease liability	54,441		54,441		62,515
Right-of-use asset	$ 65,897		$ 65,897		$ 73,600