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Other intangible assets (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, net (excluding goodwill) $ 17,532 $ 22,578  
Amortization of intangible assets 5,000 5,100 $ 9,000
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, gross 28,990 29,740  
Intangible assets, less accumulated amortization 13,724 10,650  
Intangible assets, net (excluding goodwill) 15,266 19,090  
Noncompete agreements      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, gross 4,591 4,591  
Intangible assets, less accumulated amortization 3,529 2,856  
Intangible assets, net (excluding goodwill) 1,062 1,735  
Other intangible assets      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets, gross 5,280 12,601  
Intangible assets, less accumulated amortization 4,076 10,848  
Intangible assets, net (excluding goodwill) $ 1,204 $ 1,753