Operating expenses (Schedule of Acquisition Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Acquisition-related costs	$ 2,031	$ 10,255	$ 15,067	$ 16,226
SmartEquip [Member] | Employment Costs [Member]
Acquisition-related costs	674		1,999
SmartEquip [Member] | Other Related Costs [Member]
Acquisition-related costs	90	1,101	607	1,101
Euro Auctions Limited [Member] | Other Related Costs [Member]
Acquisition-related costs	25	6,133	8,037	6,133
Rouse Services LLC [Member] | Employment Costs [Member]
Acquisition-related costs	1,189	2,707	4,077	7,938
Rouse Services LLC [Member] | Other Related Costs [Member]
Acquisition-related costs	$ 53	$ 314	$ 347	$ 1,054