COMMITMENTS AND CONTINGENCIES - Investment holdings schedule (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 176,769		$ 183,562
Qualified Affordable Housing Project Investments, Commitment	74,467		79,764
Amortization Method Qualified Affordable Housing Project Investments, Amortization	6,143	$ 4,939
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(5,781)	(5,095)
Low Income Housing Tax Credits
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	144,161		148,942
Qualified Affordable Housing Project Investments, Commitment	68,343		72,830
Amortization Method Qualified Affordable Housing Project Investments, Amortization	5,978	4,075
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(4,647)	(4,126)
Historic tax credit [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	8,669		8,781
Qualified Affordable Housing Project Investments, Commitment	5,855		6,656
Amortization Method Qualified Affordable Housing Project Investments, Amortization	112	0
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(101)	0
New Markets Tax Credit
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	1,030		1,191
Qualified Affordable Housing Project Investments, Commitment	0		0
Amortization Method Qualified Affordable Housing Project Investments, Amortization	0	31
Affordable Housing Tax Credits and Other Tax Benefits, Amount	0	(1)
Renewable Energy Program
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	10,431		10,571
Qualified Affordable Housing Project Investments, Commitment	213		222
Amortization Method Qualified Affordable Housing Project Investments, Amortization	0	0
Affordable Housing Tax Credits and Other Tax Benefits, Amount	0	0
Historic tax credit-Proportional Amort
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	12,478		14,077
Qualified Affordable Housing Project Investments, Commitment	56		$ 56
Amortization Method Qualified Affordable Housing Project Investments, Amortization	53	833
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ (1,033)	$ (968)