PORTFOLIO LOANS - Schedule of Past Due and Non-accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Commercial loans	$ 7,998,912	$ 7,651,034
90+ days past due and still accruing	712	375
Non-accrual Loans	8,393	7,441
30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	22,196	4,443
60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	1,267	1,336
Past due and non-accrual commercial loans
Financing Receivable, Past Due [Line Items]
Commercial loans	5,799,214	5,635,048
90+ days past due and still accruing	330	0
Non-accrual Loans	5,156	3,689
Past due and non-accrual commercial loans | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	19,081	776
Past due and non-accrual commercial loans | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	746	214
C&I and other commercial
Financing Receivable, Past Due [Line Items]
Commercial loans	1,942,974	1,835,994
90+ days past due and still accruing	330	0
Non-accrual Loans	1,871	2,602
C&I and other commercial | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	299	0
C&I and other commercial | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	238	214
Commercial real estate
Financing Receivable, Past Due [Line Items]
Commercial loans	3,445,514	3,337,337
90+ days past due and still accruing	0	0
Non-accrual Loans	3,285	843
Commercial real estate | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	18,782	752
Commercial real estate | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	508	0
Real estate construction
Financing Receivable, Past Due [Line Items]
Commercial loans	410,726	461,717
90+ days past due and still accruing		0
Non-accrual Loans		244
Real estate construction | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans		24
Real estate construction | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans		0
Past due and non-accrual retail loans
Financing Receivable, Past Due [Line Items]
Commercial loans	2,199,698	2,015,986
90+ days past due and still accruing	382	375
Non-accrual Loans	3,237	3,752
Past due and non-accrual retail loans | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	3,115	3,667
Past due and non-accrual retail loans | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	521	1,122
Retail real estate
Financing Receivable, Past Due [Line Items]
Commercial loans	1,727,281	1,720,455
90+ days past due and still accruing	382	366
Non-accrual Loans	3,092	3,595
Retail real estate | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	2,364	2,781
Retail real estate | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	504	927
Retail other
Financing Receivable, Past Due [Line Items]
Commercial loans	472,417	295,531
90+ days past due and still accruing	0	9
Non-accrual Loans	145	157
Retail other | 30 to 59 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	751	886
Retail other | 60 to 89 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Commercial loans	$ 17	$ 195