DEBT SECURITIES - Continuous Unrealized Loss on Investment (Details) $ in Thousands	Jun. 30, 2026 USD ($) position	Dec. 31, 2025 USD ($) position
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	$ 1,200,767	$ 352,209
AFS, Less than 12 months, Gross Unrealized Losses	11,260	1,247
AFS, Twelve months or more, Fair Value	553,843	608,420
AFS, Twelve months or more, Gross Unrealized Losses	39,508	38,123
AFS, Total, Fair Value	1,754,610	960,629
AFS, Total, Gross Unrealized Losses	$ 50,768	$ 39,370
Number of securities with unrealized losses
AFS, Less than 12 months, Number of positions with unrealized losses \| position	288	83
AFS, 12 months or more, Number of positions with unrealized losses \| position	219	240
AFS, Total , Number of positions with unrealized losses \| position	507	323
Obligations of states and political subdivisions
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	$ 112,534	$ 27,015
AFS, Less than 12 months, Gross Unrealized Losses	1,419	151
AFS, Twelve months or more, Fair Value	22,601	30,244
AFS, Twelve months or more, Gross Unrealized Losses	381	498
AFS, Total, Fair Value	135,135	57,259
AFS, Total, Gross Unrealized Losses	1,800	649
Mortgage-backed securities - residential
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	890,067	72,234
AFS, Less than 12 months, Gross Unrealized Losses	8,263	384
AFS, Twelve months or more, Fair Value	358,301	393,915
AFS, Twelve months or more, Gross Unrealized Losses	26,032	23,941
AFS, Total, Fair Value	1,248,368	466,149
AFS, Total, Gross Unrealized Losses	34,295	24,325
Mortgage-backed securities - commercial
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	116,897	106,225
AFS, Less than 12 months, Gross Unrealized Losses	1,162	405
AFS, Twelve months or more, Fair Value	151,305	156,600
AFS, Twelve months or more, Gross Unrealized Losses	11,731	11,345
AFS, Total, Fair Value	268,202	262,825
AFS, Total, Gross Unrealized Losses	12,893	11,750
Collateralized loan obligations
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	53,478	138,315
AFS, Less than 12 months, Gross Unrealized Losses	22	185
AFS, Twelve months or more, Fair Value	0	0
AFS, Twelve months or more, Gross Unrealized Losses	0	0
AFS, Total, Fair Value	53,478	138,315
AFS, Total, Gross Unrealized Losses	22	185
Corporate bonds
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	1,060	3,543
AFS, Less than 12 months, Gross Unrealized Losses	18	101
AFS, Twelve months or more, Fair Value	21,636	27,661
AFS, Twelve months or more, Gross Unrealized Losses	1,364	2,339
AFS, Total, Fair Value	22,696	31,204
AFS, Total, Gross Unrealized Losses	1,382	2,440
U.S. Treasury securities
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	20,424
AFS, Less than 12 months, Gross Unrealized Losses	250
AFS, Twelve months or more, Fair Value	0
AFS, Twelve months or more, Gross Unrealized Losses	0
AFS, Total, Fair Value	20,424
AFS, Total, Gross Unrealized Losses	250
Agency debentures
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract]
AFS, Less than 12 months, Fair Value	6,307	4,877
AFS, Less than 12 months, Gross Unrealized Losses	126	21
AFS, Twelve months or more, Fair Value	0	0
AFS, Twelve months or more, Gross Unrealized Losses	0	0
AFS, Total, Fair Value	6,307	4,877
AFS, Total, Gross Unrealized Losses	$ 126	$ 21

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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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