CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
CONDENSED CONSOLIDATED BALANCE SHEETS [Abstract]
Unbilled voyage receivable (in dollars)	$ 185,262	$ 237,298
Voyage receivables, allowance for credit losses	190	191
Vessels and other property, accumulated depreciation	$ 502,936	$ 427,274
Common stock, shares authorized	100,000,000	100,000,000
Common stock, no par value	$ 0	$ 0
Common stock, shares, issued	49,192,838	48,925,562
Common stock, shares, outstanding	49,192,838	48,925,562