Other comprehensive income (loss) (Activity in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	$ 420,042	$ 364,058	$ 429,430	$ 357,168
BALANCE	420,427	373,393	420,427	373,393
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	(15,067)	898	25	2,968
Other comprehensive income (loss)	(8,459)	1,153	(23,551)	(917)
Net other comprehensive income (loss) during period	(8,459)	1,153	(23,551)	(917)
BALANCE	(23,526)	2,051	(23,526)	2,051
AOCI, Available-for-Sale Securities Transfer to Held-to-Maturity [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	(833)		665
Other comprehensive income (loss)			(1,490)
Reclassification of amounts included in net income	29		21
Net other comprehensive income (loss) during period	29		(1,469)
BALANCE	(804)		(804)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	344	185	753	(785)
Other comprehensive income (loss)	(662)	102	(1,071)	1,072
Net other comprehensive income (loss) during period	(662)	102	(1,071)	1,072
BALANCE	(318)	287	(318)	287
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCE	(15,556)	1,083	1,443	2,183
Other comprehensive income (loss)	(9,121)	1,255	(26,112)	155
Reclassification of amounts included in net income	29		21
Net other comprehensive income (loss) during period	(9,092)	1,255	(26,091)	155
BALANCE	$ (24,648)	$ 2,338	$ (24,648)	$ 2,338