Other non-current assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other non-current assets
Right-of-use assets	$ 116,503	$ 116,209
Tax receivable	11,050	11,792
Loans receivable	4,870
Equity-accounted investments		4,276
Deferred debt issue costs	2,263	1,403
Other	12,922	11,999
Other non-current assets	$ 147,608	$ 145,679