Other non-current assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other non-current assets
Right-of-use assets	$ 106,710	$ 116,209
Tax receivable	11,306	11,792
Equity-accounted investments		4,276
Deferred debt issue costs	2,465	1,403
Other	14,492	11,999
Other non-current assets	$ 134,973	$ 145,679