Securities - Tax credits earned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Securities
Tax Credits Earned	$ 10,832	$ 17,306	$ 17,306
Current Year Pass Through Income (Losses)	(3,228)	(10,317)	(1,360)
Solar Tax Credit Investments | Sunwealth Project Pool 20 LLC
Securities
Current Year Pass Through Income (Losses)	79	79	79
Solar Tax Credit Investments | Sunwealth Project Pool 26 LLC
Securities
Current Year Pass Through Income (Losses)	141	212	232
Solar Tax Credit Investments | Sunwealth Project Pool 48 LLC
Securities
Tax Credits Earned		2,593	2,593
Current Year Pass Through Income (Losses)	63	(1,662)
Solar Tax Credit Investments | Borden Avenue
Securities
Tax Credits Earned		7,128	7,128
Current Year Pass Through Income (Losses)	153	(7,360)
Solar Tax Credit Investments | Franklin Road
Securities
Tax Credits Earned		7,539	7,539
Current Year Pass Through Income (Losses)	165	(570)
Solar Tax Credit Investments | Holyoke
Securities
Tax Credits Earned	3,766
Current Year Pass Through Income (Losses)	(3,454)
Solar Tax Credit Investments | Bertoline
Securities
Tax Credits Earned	6,817
Current Year Pass Through Income (Losses)	(425)
Solar Tax Credit Investments | Maple Crest
Securities
Current Year Pass Through Income (Losses)	51	(934)	(1,404)
Solar Tax Credit Investments | Mill Lane
Securities
Current Year Pass Through Income (Losses)	7	7	(267)
LIHTC Investments | USA Institutional Tax Credit Fund CXLIV L.P
Securities
Tax Credits Earned	249	46	$ 46
Current Year Pass Through Income (Losses)	(518)	$ (89)
LIHTC Investments | Court Street Workforce Housing Limited Partnership
Securities
Current Year Pass Through Income (Losses)	533
LIHTC Investments | National Equity Fund Northeast Regional Fund 2025 LP
Securities
Current Year Pass Through Income (Losses)	$ (23)