CONSOLIDATED BALANCE SHEETS (Parenthetical) £ in Thousands, $ in Thousands	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
CONSOLIDATED BALANCE SHEETS [Abstract]
Unbilled voyage receivable (in dollars) | $	$ 279,567	$ 100,137
Voyage receivables, allowance for credit losses	$ 261	$ 31
Common stock, shares authorized	100,000,000	100,000,000
Common stock, no par value | $ / shares	$ 0	$ 0
Common stock, shares, issued	49,120,648	49,612,019
Common stock, shares, outstanding	49,120,648	49,612,019