Other intangible assets (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net (excluding goodwill)	$ 3,049	$ 5,213	$ 3,049	$ 5,213	$ 4,102
Amortization of intangible assets	522	568	1,100	1,100
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	10,450	10,450	10,450	10,450	10,450
Intangible assets, less accumulated amortization	7,401	5,312	7,401	5,312	6,356
Intangible assets, net (excluding goodwill)	3,049	5,138	3,049	5,138	4,094
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	292	552	292	552	552
Intangible assets, less accumulated amortization	292	477	292	477	544
Intangible assets, net (excluding goodwill)	$ 0	$ 75	$ 0	$ 75	$ 8