LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 12, 2021	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		$ (34,782)		$ (2,652)		$ (4,944)
Financing Receivable, Allowance for Credit Loss, Recovery		1,335		1,649		3,729
Contractual cash flows not expected to be collected	$ 16,540
Financing Receivable, Credit Loss, Expense (Reversal)		23,250		6,500		18,205
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		142,222	[1]	152,419	[1]	146,922	[1]	$ 113,392
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(23,564)		0		(3,474)
Financing Receivable, Allowance for Credit Loss, Recovery		145		49		2,686
Contractual cash flows not expected to be collected	166
Financing Receivable, Credit Loss, Expense (Reversal)		15,103		13,108		(6,062)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		19,243	[1]	27,559	[1]	14,402	[1]	21,086
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(7,855)		(62)		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		333		57
Contractual cash flows not expected to be collected	14,397
Financing Receivable, Credit Loss, Expense (Reversal)		4,204		(5,958)		24,023
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		74,148	[1]	77,799	[1]	83,486	[1]	45,009
Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		0
Contractual cash flows not expected to be collected	1,019
Financing Receivable, Credit Loss, Expense (Reversal)		(3,079)		(1,554)		5,900
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		7,683	[1]	10,762	[1]	12,316	[1]	5,397
Small Business [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(484)		(196)		(219)
Financing Receivable, Allowance for Credit Loss, Recovery		92		149		98
Contractual cash flows not expected to be collected	0
Financing Receivable, Credit Loss, Expense (Reversal)		1,521		(627)		(1,466)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		3,963	[1]	2,834	[1]	3,508	[1]	5,095
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		1
Contractual cash flows not expected to be collected	429
Financing Receivable, Credit Loss, Expense (Reversal)		2,664		6,489		(221)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		23,637	[1]	20,973	[1]	14,484	[1]	14,275
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(47)		(122)		(69)
Financing Receivable, Allowance for Credit Loss, Recovery		62		121		249
Contractual cash flows not expected to be collected	163
Financing Receivable, Credit Loss, Expense (Reversal)		1,278		(6,481)		(4,417)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		12,797	[1]	11,504	[1]	17,986	[1]	22,060
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(2,832)		(2,272)		(1,182)
Financing Receivable, Allowance for Credit Loss, Recovery		1,036		997		638
Contractual cash flows not expected to be collected	$ 366
Financing Receivable, Credit Loss, Expense (Reversal)		1,559		1,523		448
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 751	[1]	$ 988	[1]	$ 740	[1]	$ 470

[1] Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $60.2 million, $50.8 million, and $43.7 million at December 31, 2023, 2022, and 2021, respectively.