Other asset and other liabilities - Intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Goodwill	$ 38,530		$ 38,530
Finite-lived intangible assets	14,572
Total Intangible Assets	18,072		17,749
Amortization expense	400	$ 600
Total Accumulated Amortization	7,272
Future amortization of lease intangibles
2024	2,249
2025	2,843
2026	2,191
2027	2,071
2028	1,054
Thereafter	4,164
Net amount	14,572
Trade name | Red Stone
Indefinite-lived intangible assets	2,500		2,500
SBA license
Indefinite-lived intangible assets	1,000		1,000
LMM Commercial Real Estate
Goodwill	27,324		27,324
Small Business Lending
Goodwill	11,206		11,206
Customer relationships | Red Stone
Finite-lived intangible assets	$ 5,846		5,935
Estimated Useful Life	19 years
Total Accumulated Amortization	$ 954
Future amortization of lease intangibles
Net amount	5,846		5,935
Internally developed software
Finite-lived intangible assets	$ 7,469		6,795
Estimated Useful Life	5 years
Total Accumulated Amortization	$ 1,695
Future amortization of lease intangibles
Net amount	7,469		6,795
Internally developed software | Knight Capital
Finite-lived intangible assets	$ 1,003		1,161
Estimated Useful Life	6 years
Total Accumulated Amortization	$ 2,797
Future amortization of lease intangibles
Net amount	1,003		1,161
Broker network | Knight Capital
Finite-lived intangible assets	$ 22		89
Estimated Useful Life	4 years 6 months
Total Accumulated Amortization	$ 1,178
Future amortization of lease intangibles
Net amount	22		89
Trade name | Knight Capital
Finite-lived intangible assets	$ 232		269
Estimated Useful Life	6 years
Total Accumulated Amortization	$ 648
Future amortization of lease intangibles
Net amount	$ 232		$ 269