PORTFOLIO LOANS - Schedule of Risk Grades Segregated by Category and Class of Portfolio Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	$ 7,998,912	$ 7,651,034
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	7,038,785	6,736,067
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	743,579	747,122
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	121,576	96,057
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	86,579	64,347
Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	8,393	7,441
Total commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	5,799,214	5,635,048
Total commercial loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	4,856,497	4,737,796
Total commercial loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	732,810	735,978
Total commercial loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	120,666	95,033
Total commercial loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	84,085	62,552
Total commercial loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	5,156	3,689
C&I and other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,942,974	1,835,994
C&I and other commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,601,884	1,462,755
C&I and other commercial | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	246,652	296,416
C&I and other commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	46,758	46,488
C&I and other commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	45,809	27,733
C&I and other commercial | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,871	2,602
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	3,445,514	3,337,337
Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,879,762	2,827,030
Commercial real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	463,765	431,427
Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	65,702	48,545
Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	33,000	29,492
Commercial real estate | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	3,285	843
Real estate construction
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	410,726	461,717
Real estate construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	374,851	448,011
Real estate construction | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	22,393	8,135
Real estate construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	8,206	0
Real estate construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	5,276	5,327
Real estate construction | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	0	244
Total retail loans
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,199,698	2,015,986
Total retail loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,182,288	1,998,271
Total retail loans | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	10,769	11,144
Total retail loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	910	1,024
Total retail loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,494	1,795
Total retail loans | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	3,237	3,752
Retail real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,727,281	1,720,455
Retail real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	1,710,016	1,702,897
Retail real estate | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	10,769	11,144
Retail real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	910	1,024
Retail real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	2,494	1,795
Retail real estate | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	3,092	3,595
Retail other
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	472,417	295,531
Retail other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	472,272	295,374
Retail other | Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	0	0
Retail other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	0	0
Retail other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	0	0
Retail other | Substandard Non-accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Commercial loans	$ 145	$ 157