Derivative financial instruments - Schedule of fair value of derivative instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Offsetting Liabilities [Line Items]
Interest rate swaps - cash flow hedges, current liabilities	$ 630	$ 1,401
Interest rate swaps - cash flow hedges, non current liabilities		$ 2,999
Interest rate swaps - cash flow hedges
Offsetting Liabilities [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Assets, Current	Other Assets, Current
Total current assets	$ 1,211	$ 0
Total non-current assets:	1,233	0
Total current liabilities	(630)	(1,401)
Total non-current liabilities	0	(2,999)
Net derivative assets (liabilities)	$ 1,814	$ (4,400)