Other intangible assets (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net (excluding goodwill)	$ 21,389	$ 23,961	$ 22,578
Amortization of intangible assets	1,200	1,500
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	28,990	28,836	29,740
Intangible assets, less accumulated amortization	10,846	7,792	10,650
Intangible assets, net (excluding goodwill)	18,144	21,044	19,090
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	4,591	3,941	4,591
Intangible assets, less accumulated amortization	3,016	2,441	2,856
Intangible assets, net (excluding goodwill)	1,575	1,500	1,735
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	6,969	11,957	12,601
Intangible assets, less accumulated amortization	5,299	10,540	10,848
Intangible assets, net (excluding goodwill)	$ 1,670	$ 1,417	$ 1,753