Concentrations of risk and geographic information - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue, Major Customer [Line Items]
Revenue	$ 1,093,541	$ 1,161,084	$ 891,925
United States [Member]
Revenue, Major Customer [Line Items]
Revenue	446,000	526,500	$ 428,300
Outside the United States [Member]
Revenue, Major Customer [Line Items]
Long-lived assets	$ 4,000	$ 6,200