LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) loan	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) loan	Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 4,464,834,000		$ 4,464,834,000		$ 4,275,178,000
Provision for credit loss expense	2,405,000	$ 2,905,000	3,695,000	$ 4,548,000
Allowance for unfunded commitments	56,000	$ 0	$ 115,000	$ 586,000
Loans modified as troubled debt restructuring with subsequent defaults	0
Amortized cost in troubled debt restructurings					12,400,000
Financing receivable, troubled debt restructuring, allowance for loans					2,200,000
Financing receivable, modifications, number of contracts | loan		0		1
Minimum period to be considered for loan to have defaulted			90 days
Loans modified as troubled debt restructuring with subsequent defaults | loan				0
Principal balances forgiven in connection with loan restructuring	0		$ 0
Syndicated loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	145,627,000		145,627,000		156,649,000
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	778,704,000		778,704,000		791,911,000
Commercial and Industrial | Syndicated loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans receivable	$ 145,600,000		$ 145,600,000		$ 156,600,000