Acquisitions - Assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 35,958	$ 14,690	$ 0
Daxx
Business Acquisition [Line Items]
Current assets	4,527
Property, plant and equipment	352
Intangible assets	8,174
Goodwill	14,690
Total assets acquired	27,743
Accounts payable and accrued expenses	(4,718)
Deferred taxes	(2,639)
Total liabilities assumed	(7,357)
Purchase price allocation	20,386
Tactic
Business Acquisition [Line Items]
Current assets	9,145
Property, plant and equipment	466
Intangible assets	12,913
Goodwill	21,268
Total assets acquired	43,792
Accounts payable and accrued expenses	(3,675)
Deferred taxes	(2,500)
Total liabilities assumed	(6,175)
Purchase price allocation	$ 37,617