PORTFOLIO LOANS - Schedule of Risk Grades by Portfolio Class (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	$ 13,567,799	$ 7,697,087
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	11,818,297	6,764,070
Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	1,229,823	756,610
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	349,822	92,296
Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	118,659	62,023
Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	51,198	22,088
Commercial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	10,818,515	5,552,288
Commercial loans | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	9,117,788	4,635,264
Commercial loans | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	1,199,149	747,202
Commercial loans | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	342,315	91,414
Commercial loans | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	116,860	59,480
Commercial loans | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	42,403	18,928
Commercial loans | C&I and other commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	4,229,208	1,904,515
Commercial loans | C&I and other commercial | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	3,567,589	1,545,338
Commercial loans | C&I and other commercial | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	375,113	281,424
Commercial loans | C&I and other commercial | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	176,814	36,152
Commercial loans | C&I and other commercial | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	75,394	37,749
Commercial loans | C&I and other commercial | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	34,298	3,852
Commercial loans | CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	5,550,018	3,269,564
Commercial loans | CRE | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	4,607,134	2,744,018
Commercial loans | CRE | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	769,405	438,945
Commercial loans | CRE | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	140,967	55,041
Commercial loans | CRE | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	24,680	16,507
Commercial loans | CRE | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	7,832	15,053
Commercial loans | Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	1,039,289	378,209
Commercial loans | Real estate construction | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	943,065	345,908
Commercial loans | Real estate construction | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	54,631	26,833
Commercial loans | Real estate construction | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	24,534	221
Commercial loans | Real estate construction | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	16,786	5,224
Commercial loans | Real estate construction | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	273	23
Retail loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	2,749,284	2,144,799
Retail loans | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	2,700,509	2,128,806
Retail loans | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	30,674	9,408
Retail loans | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	7,507	882
Retail loans | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	1,799	2,543
Retail loans | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	8,795	3,160
Retail loans | CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	2,154,616	1,696,457
Retail loans | CRE | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	2,106,215	1,680,640
Retail loans | CRE | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	30,674	9,408
Retail loans | CRE | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	7,507	882
Retail loans | CRE | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	1,799	2,543
Retail loans | CRE | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	8,421	2,984
Retail loans | Retail other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	594,668	448,342
Retail loans | Retail other | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	594,294	448,166
Retail loans | Retail other | Watch
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	0	0
Retail loans | Retail other | Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	0	0
Retail loans | Retail other | Substandard
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	0	0
Retail loans | Retail other | Substandard Non-accrual
Financing Receivable, Allowance for Credit Loss [Line Items]
Total portfolio loans	$ 374	$ 176