Goodwill and intangible assets - Company's other intangible assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill and intangible assets
Gross Carrying Amount	$ 32,997	$ 33,397
Accumulated Amortization	15,433	13,040
Net	17,564	20,357
Covenant not to compete
Goodwill and intangible assets
Gross Carrying Amount	870	1,270
Accumulated Amortization	710	1,023
Net	$ 160	247
Covenant not to compete | Maximum
Goodwill and intangible assets
Amortization Period (in years)	10 years
Covenant not to compete | Minimum
Goodwill and intangible assets
Amortization Period (in years)	6 years
Customer relationships
Goodwill and intangible assets
Gross Carrying Amount	$ 31,560	31,560
Accumulated Amortization	14,491	11,829
Net	$ 17,069	19,731
Customer relationships | Maximum
Goodwill and intangible assets
Amortization Period (in years)	12 years
Customer relationships | Minimum
Goodwill and intangible assets
Amortization Period (in years)	3 years
Above market leases
Goodwill and intangible assets
Amortization Period (in years)	13 years
Gross Carrying Amount	$ 567	567
Accumulated Amortization	232	188
Net	$ 335	$ 379