Long-term debt - Schedule of variable rate debt obligation (Details)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Experience Vessel Financing [Member]
Debt Instrument [Line Items]
Debt instrument weighted average interest rate		8.40%	4.80%	4.40%
Experience Vessel Financing [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		8.00%	3.50%	4.30%
Experience Vessel Financing [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		8.80%	6.80%	4.40%
2017 Bank Loans [Member]
Debt Instrument [Line Items]
Debt instrument weighted average interest rate	[1]	9.10%	5.20%	4.30%
2017 Bank Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	[1]	7.00%	2.60%	2.60%
2017 Bank Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	[1]	10.10%	7.00%	4.70%
EE Revolver [Member]
Debt Instrument [Line Items]
Debt instrument weighted average interest rate			3.90%
EE Revolver [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate			3.90%
EE Revolver [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate			3.90%
Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt instrument weighted average interest rate	[2]	8.30%
Term Loan Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	[2]	7.80%
Term Loan Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	[2]	8.50%

[1] Weighted average interest rate, net of the impact of settled derivatives, was 6.4%, 5.8% and 5.4% for the years ended December 31, 2023, 2022 and 2021, respectively

[2] Weighted average interest rate, net of the impact of settled derivatives, was 5.8% for the year ended December 31, 2023.