Intangible Assets, Goodwill and Other Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 196,834	$ 188,145
Accumulated Amortization	69,771	59,403
Carrying Value	$ 127,063	128,742
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period in Years	9 years
Gross Carrying Amount	$ 37,933	29,244
Accumulated Amortization	15,770	13,759
Carrying Value	$ 22,163	15,485
Marine transportation
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period in Years	20 years
Marine transportation | Contract intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 800	800
Accumulated Amortization	607	571
Carrying Value	$ 193	229
Offshore pipeline transportation
Finite-Lived Intangible Assets [Line Items]
Weighted Amortization Period in Years	19 years
Offshore pipeline transportation | Contract intangible
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 158,101	158,101
Accumulated Amortization	53,394	45,073
Carrying Value	$ 104,707	$ 113,028