Other non-current assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other non-current assets
Right-of-use assets	$ 107,646	$ 116,209
Tax receivable	10,126	11,792
Equity-accounted investments		4,276
Deferred debt issue costs	1,211	1,403
Other	13,493	11,999
Other non-current assets	$ 132,476	$ 145,679