PORTFOLIO LOANS - Schedule of Risk Grades Segregated by Category and Class of Portfolio Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	$ 13,868,357	$ 7,697,087
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	11,993,345	6,764,070
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,399,056	756,610
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	291,506	92,296
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	135,803	62,023
Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	48,647	22,088
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	11,138,488	5,552,288
Commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	9,288,981	4,635,264
Commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,391,562	747,202
Commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	284,810	91,414
Commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	127,212	59,480
Commercial loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	45,923	18,928
Commercial loans | C&I and other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	4,513,543	1,904,515
Commercial loans | C&I and other commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	3,765,745	1,545,338
Commercial loans | C&I and other commercial | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	500,705	281,424
Commercial loans | C&I and other commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	121,321	36,152
Commercial loans | C&I and other commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	87,567	37,749
Commercial loans | C&I and other commercial | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	38,205	3,852
Commercial loans | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	5,573,766	3,269,564
Commercial loans | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	4,571,478	2,744,018
Commercial loans | CRE | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	822,841	438,945
Commercial loans | CRE | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	137,373	55,041
Commercial loans | CRE | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	34,375	16,507
Commercial loans | CRE | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	7,699	15,053
Commercial loans | Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,051,179	378,209
Commercial loans | Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	951,758	345,908
Commercial loans | Real estate construction | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	68,016	26,833
Commercial loans | Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	26,116	221
Commercial loans | Real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	5,270	5,224
Commercial loans | Real estate construction | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	19	23
Retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,729,869	2,144,799
Retail loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,704,364	2,128,806
Retail loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	7,494	9,408
Retail loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	6,696	882
Retail loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	8,591	2,543
Retail loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,724	3,160
Retail loans | CRE
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,245,705	1,696,457
Retail loans | CRE | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,220,625	1,680,640
Retail loans | CRE | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	7,344	9,408
Retail loans | CRE | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	6,696	882
Retail loans | CRE | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	8,410	2,543
Retail loans | CRE | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,630	2,984
Retail loans | Retail other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	484,164	448,342
Retail loans | Retail other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	483,739	448,166
Retail loans | Retail other | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	150	0
Retail loans | Retail other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	0	0
Retail loans | Retail other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	181	0
Retail loans | Retail other | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	$ 94	$ 176