Investment securities available for sale - Summary of investment securities available for sale having fair value and unrealized loss position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Securities in a loss position for less than 12 Months, Fair Value	$ 8,776	$ 63,242
Securities in a loss position for less than 12 Months, Unrealized Losses	(611)	(4,809)
Securities in a loss position for more than 12 Months, Fair Value	58,193	63,361
Securities in a loss Position for more than 12 Months, Unrealized Losses	(7,155)	(8,981)
Total Fair Value	66,969	126,603
Total Unrealized Losses	(7,766)	(13,790)
U.S. Government agencies obligations
Schedule of Available-for-sale Securities [Line Items]
Securities in a loss position for less than 12 Months, Fair Value	0	21,848
Securities in a loss position for less than 12 Months, Unrealized Losses	0	(723)
Securities in a loss position for more than 12 Months, Fair Value	20,289	37,256
Securities in a loss Position for more than 12 Months, Unrealized Losses	(75)	(3,011)
Total Fair Value	20,289	59,104
Total Unrealized Losses	(75)	(3,734)
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Securities in a loss position for less than 12 Months, Fair Value	4,631	36,089
Securities in a loss position for less than 12 Months, Unrealized Losses	(24)	(3,588)
Securities in a loss position for more than 12 Months, Fair Value	30,311	22,549
Securities in a loss Position for more than 12 Months, Unrealized Losses	(5,357)	(5,009)
Total Fair Value	34,942	58,638
Total Unrealized Losses	(5,381)	(8,597)
Municipals
Schedule of Available-for-sale Securities [Line Items]
Securities in a loss position for less than 12 Months, Fair Value	0	0
Securities in a loss position for less than 12 Months, Unrealized Losses	0	0
Securities in a loss position for more than 12 Months, Fair Value	1,656	1,549
Securities in a loss Position for more than 12 Months, Unrealized Losses	(608)	(718)
Total Fair Value	1,656	1,549
Total Unrealized Losses	(608)	(718)
Subordinated debt
Schedule of Available-for-sale Securities [Line Items]
Securities in a loss position for less than 12 Months, Fair Value	4,145	5,305
Securities in a loss position for less than 12 Months, Unrealized Losses	(587)	(498)
Securities in a loss position for more than 12 Months, Fair Value	5,937	2,007
Securities in a loss Position for more than 12 Months, Unrealized Losses	(1,115)	(243)
Total Fair Value	10,082	7,312
Total Unrealized Losses	$ (1,702)	$ (741)