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INVESTMENT SECURITIES - Additional Information (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Gross unrealized loss	$ 78,002			$ 78,002		$ 66,181
Accrued interest receivable on loans receivable	$ 11,800			$ 11,800		$ 9,200
Securities available for sale portfolio | security	86			86		77
Available for sale securities in unrealized loss position | security	84			84		76
Credit losses on available for sale securities		$ 0			$ 0
Credit losses on held to maturity securities		$ 0			$ 0
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Available for sale securities in unrealized loss position | security	81			81
Collateral Pledged | FRB Discount Window
Debt Securities, Available-for-sale [Line Items]
Securities pledged	$ 525,700			$ 525,700		$ 356,500
Certain Longer Duration Fixed-Rate Mortgage Backed Securities and Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost basis, transferred from the available-for-sale portfolio to the held-to-maturity portfolio			$ 346,000
Available-for-sale securities, accumulated gross unrealized loss, before tax			$ 16,600
Gross unrealized loss	15,000			15,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Credit losses on available for sale securities	$ 0			$ 1,000
Number of corporate debt securities | security	3			3

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