Other intangible assets (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net (excluding goodwill)	$ 18,745	$ 22,241	$ 18,745	$ 22,241	$ 22,578
Amortization of intangible assets	1,300	1,200	3,800	3,900
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	28,990	29,423	28,990	29,423	29,740
Intangible assets, less accumulated amortization	12,768	9,705	12,768	9,705	10,650
Intangible assets, net (excluding goodwill)	16,222	19,718	16,222	19,718	19,090
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	4,591	3,991	4,591	3,991	4,591
Intangible assets, less accumulated amortization	3,377	2,710	3,377	2,710	2,856
Intangible assets, net (excluding goodwill)	1,214	1,281	1,214	1,281	1,735
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	5,279	11,957	5,279	11,957	12,601
Intangible assets, less accumulated amortization	3,970	10,715	3,970	10,715	10,848
Intangible assets, net (excluding goodwill)	$ 1,309	$ 1,242	$ 1,309	$ 1,242	$ 1,753