Ransomware incident (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Text Block Supplement [Abstract]
Ransomware related incident costs, gross			$ 12,700
Ransomware related incident costs, net	$ (3,944)	$ (1,350)	7,681
Insurance recoveries	0	0	$ 5,000
Additional collection of recorded insurance receivable	3,900	1,600
Collection of recorded insurance receivable		$ 6,600
Insurance recoveries collected at point in time	$ 10,500