Basis of presentation - Schedule of Effect From Topic 842 (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property and equipment, net	$ 247,548	$ 243,717
Operating lease right-of-use assets	63,895	70,407
Operating lease liabilities - current	13,583	13,431
Operating lease liabilities - non-current	34,655	40,650
Other current liabilities	$ 66,818	$ 20,716