Risk Concentrations (Schedule of Foreign Revenues) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Revenues	$ 2,208,042	$ 1,467,592	$ 2,294,352
Seaborne Revenue
Concentration Risk [Line Items]
Revenues	1,149,039	496,930	960,320
Europe | Seaborne Revenue
Concentration Risk [Line Items]
Revenues	592,702	289,176	537,117
Asia | Seaborne Revenue
Concentration Risk [Line Items]
Revenues	446,724	138,086	322,029
Central and South America | Seaborne Revenue
Concentration Risk [Line Items]
Revenues	$ 109,613	56,905	82,476
Africa | Seaborne Revenue
Concentration Risk [Line Items]
Revenues		$ 12,763	$ 18,698