INVESTMENT SECURITIES - Continuous Unrealized Loss on Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
AFS
AFS, Less than 12 months, Gross unrealized losses	$ (365)	$ (890)
AFS, Less than 12 months, Fair value	30,563	36,374
AFS, Twelve months or more, Gross unrealized losses	(100,836)	(115,029)
AFS, Twelve months or more, Fair value	916,287	945,595
AFS, Total, Gross unrealized losses	(101,201)	(115,919)
AFS, Total, Fair value	946,850	981,969
Residential
AFS
AFS, Less than 12 months, Gross unrealized losses	(2)	(2)
AFS, Less than 12 months, Fair value	526	532
AFS, Twelve months or more, Gross unrealized losses	(4,650)	(7,652)
AFS, Twelve months or more, Fair value	151,754	158,044
AFS, Total, Gross unrealized losses	(4,652)	(7,654)
AFS, Total, Fair value	152,280	158,576
Commercial
AFS
AFS, Less than 12 months, Gross unrealized losses	0	0
AFS, Less than 12 months, Fair value	0	0
AFS, Twelve months or more, Gross unrealized losses	(5,405)	(6,978)
AFS, Twelve months or more, Fair value	48,843	47,642
AFS, Total, Gross unrealized losses	(5,405)	(6,978)
AFS, Total, Fair value	48,843	47,642
Residential collateralized mortgage obligations
AFS
AFS, Less than 12 months, Gross unrealized losses	(13)	(78)
AFS, Less than 12 months, Fair value	11,685	7,481
AFS, Twelve months or more, Gross unrealized losses	(24,462)	(31,862)
AFS, Twelve months or more, Fair value	268,109	293,297
AFS, Total, Gross unrealized losses	(24,475)	(31,940)
AFS, Total, Fair value	279,794	300,778
Commercial collateralized mortgage obligations
AFS
AFS, Less than 12 months, Gross unrealized losses	(1)	0
AFS, Less than 12 months, Fair value	3,067	0
AFS, Twelve months or more, Gross unrealized losses	(3,944)	(4,794)
AFS, Twelve months or more, Fair value	49,178	51,834
AFS, Total, Gross unrealized losses	(3,945)	(4,794)
AFS, Total, Fair value	52,245	51,834
Municipal bonds
AFS
AFS, Less than 12 months, Gross unrealized losses	(349)	(810)
AFS, Less than 12 months, Fair value	15,285	28,361
AFS, Twelve months or more, Gross unrealized losses	(54,434)	(54,188)
AFS, Twelve months or more, Fair value	343,646	340,571
AFS, Total, Gross unrealized losses	(54,783)	(54,998)
AFS, Total, Fair value	358,931	368,932
HTM
HFM, Less than 12 months, Gross unrealized losses	0	0
HFM, Less than 12 months, Fair value	0	0
HFM, 12 months or more, Gross unrealized losses	(12)	(28)
HFM, 12 months or more, Fair value	2,253	2,273
HFM, Total, Gross unrealized losses	(12)	(28)
HTM, Total, Fair value	2,253	2,273
Corporate debt securities
AFS
AFS, Less than 12 months, Gross unrealized losses	0	0
AFS, Less than 12 months, Fair value	0	0
AFS, Twelve months or more, Gross unrealized losses	(5,575)	(6,192)
AFS, Twelve months or more, Fair value	25,546	24,944
AFS, Total, Gross unrealized losses	(5,575)	(6,192)
AFS, Total, Fair value	25,546	24,944
U.S. Treasury securities
AFS
AFS, Less than 12 months, Gross unrealized losses	0	0
AFS, Less than 12 months, Fair value	0	0
AFS, Twelve months or more, Gross unrealized losses	(1,631)	(2,319)
AFS, Twelve months or more, Fair value	20,498	19,987
AFS, Total, Gross unrealized losses	(1,631)	(2,319)
AFS, Total, Fair value	20,498	19,987
Agency debentures
AFS
AFS, Less than 12 months, Gross unrealized losses	0	0
AFS, Less than 12 months, Fair value	0	0
AFS, Twelve months or more, Gross unrealized losses	(735)	(1,044)
AFS, Twelve months or more, Fair value	8,713	9,276
AFS, Total, Gross unrealized losses	(735)	(1,044)
AFS, Total, Fair value	$ 8,713	$ 9,276

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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