Other comprehensive income (loss) (Activity in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	$ 429,430	$ 357,168	$ 312,747
BALANCE	432,452	429,430	357,168
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	25	2,968	391
Other comprehensive income (loss)	(34,231)	(2,910)	2,581
Reclassification of amounts included in net income	590	(33)	(4)
Net other comprehensive income (loss) during period	(33,641)	(2,943)	2,577
BALANCE	(33,616)	25	2,968
AOCI, Available-for-Sale Securities Transfer to Held-to-Maturity [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	665
Other comprehensive income (loss)	(1,490)	671
Reclassification of amounts included in net income	83	(6)
Net other comprehensive income (loss) during period	(1,407)	665
BALANCE	(742)	665
AOCI, Fair Value Municipal Security Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	753	(785)	(223)
Other comprehensive income (loss)	(56)	1,538	(562)
Reclassification of amounts included in net income	(697)
Net other comprehensive income (loss) during period	(753)	1,538	(562)
BALANCE		753	(785)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss)	(966)
Net other comprehensive income (loss) during period	(966)
BALANCE	(966)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	1,443	2,183	168
Other comprehensive income (loss)	(36,743)	(701)	2,019
Reclassification of amounts included in net income	(24)	(39)	(4)
Net other comprehensive income (loss) during period	(36,767)	(740)	2,015
BALANCE	$ (35,324)	$ 1,443	$ 2,183