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INVESTMENT SECURITIES - Debt Securities, Held-to-Maturity, Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	$ 938,161	$ 991,937
Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	409,904	471,996
Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	6,833	6,880
Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	1,750	1,770
Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	165,521	169,754
Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	171,307	158,320
Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	182,846	$ 183,217
AAA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	82,060
AAA | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AAA | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	82,060
AA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	26,323
AA | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	0
AA | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	26,323
Not Rated
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	829,778
Not Rated | Asset-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	409,904
Not Rated | Agency-guaranteed residential mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	6,833
Not Rated | Agency-guaranteed commercial mortgage-backed securities
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	1,750
Not Rated | Agency-guaranteed residential collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	165,521
Not Rated | Agency-guaranteed commercial collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	171,307
Not Rated | Private label collateralized mortgage obligations
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities held to maturity	$ 74,463

X

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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