Debt - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Commitment fees on revolving credit facilities	$ 860	$ 994	$ 573
Amortization of debt discount and debt issuance costs	2,738	2,130	7,083
Interest Expense, Total	23,602	16,981	32,257
Convertible Bond Debt
Debt Instrument [Line Items]
Line of credit facility, interest expense	5,206	5,547	5,738
Global Ultraco Debt Facility | Interest Rate Swap
Debt Instrument [Line Items]
Interest rate gain (loss) reclassified to earnings	(9,600)	(1,900)	500
Global Ultraco Debt Facility | Secured Debt
Debt Instrument [Line Items]
Debt, interest expense	9,657	8,310	2,474
Global Ultraco Debt Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Debt, interest expense	5,141	0	0
Norwegian Bond Debt
Debt Instrument [Line Items]
Debt, interest expense	0	0	11,710
New Ultraco Debt Facility
Debt Instrument [Line Items]
Debt, interest expense	0	0	4,335
New Ultraco Debt Facility | Interest Rate Swap
Debt Instrument [Line Items]
Interest rate gain (loss) reclassified to earnings			(500)
Holdco Revolving Credit Facility
Debt Instrument [Line Items]
Debt, interest expense	0	0	314
Super Senior Revolver Facility
Debt Instrument [Line Items]
Debt, interest expense	$ 0	$ 0	$ 30