Other intangible assets (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net (excluding goodwill)	$ 2,526	$ 4,648	$ 2,526	$ 4,648	$ 4,102
Amortization of intangible assets	522	565	1,600	1,700
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	7,924	5,834	7,924	5,834	6,356
Intangible assets, net (excluding goodwill)	2,526	4,616	2,526	4,616	4,094
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	292	552	292	552	552
Intangible assets, less accumulated amortization	292	520	292	520	544
Intangible assets, net (excluding goodwill)	$ 0	$ 32	$ 0	$ 32	$ 8