Other comprehensive income (loss) (Activity in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	$ 357,168	$ 312,747
BALANCE	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	2,968	391
Other comprehensive income (loss)	(2,910)	2,581
Reclassification of amounts included in net income	(33)	(4)
Net other comprehensive income (loss) during period	(2,943)	2,577
BALANCE	25	2,968
AOCI, Available-for-Sale Securities Transfer to Held-to-Maturity [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss)	671
Reclassification of amounts included in net income	(6)
Net other comprehensive income (loss) during period	665
BALANCE	665
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	(785)	(223)
Other comprehensive income (loss)	1,538	(562)
Net other comprehensive income (loss) during period	1,538	(562)
BALANCE	753	(785)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	2,183	168
Other comprehensive income (loss)	(701)	2,019
Reclassification of amounts included in net income	(39)	(4)
Net other comprehensive income (loss) during period	(740)	2,015
BALANCE	$ 1,443	$ 2,183