INVESTMENT SECURITIES - Equity and Other Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Equity and Other Securities
Amortized Cost	$ 53,595	$ 82,424
Gross Unrealized Gains	918	918
Gross Unrealized Losses	0	0
Equity and other securities	54,513	83,342
Equity Securities, at Fair Value
Amortized Cost	251	251
Gross Unrealized Gains	168	168
Gross Unrealized Losses	0	0
Fair Value	419	419
Other Equity Securities, at Adjusted Cost
Gross Unrealized Losses	387,740	524,188
Federal Home Loan Bank Common Stock
Other Equity Securities, at Adjusted Cost
Amortized Cost	15,342	47,497
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	15,342	47,497
Federal Reserve Bank Common Stock
Other Equity Securities, at Adjusted Cost
Amortized Cost	33,568	31,144
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	33,568	31,144
Other Equity Securities
Other Equity Securities, at Adjusted Cost
Amortized Cost	4,434	3,532
Gross Unrealized Gains	750	750
Gross Unrealized Losses	0	0
Fair Value	$ 5,184	$ 4,282