SECURITIES - Narrative (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Jan. 01, 2021
Securities available-for-sale:
Securities available-for-sale transferred to held-to-maturity	$ 372,154,000
Transfers Of Securities Held-to-maturity To Securities Available-for-sale	0
Transfers To Or From Securities Held-to-maturity		0
Securities held-to-maturity	$ 511,054,000		$ 177,354,000	$ 0
Number of holdings of securities of any one issuer in an amount greater than 10% of stockholders equity	0		0
Threshold for disclosure percentage	10.00%		10.00%
Available for sale debt securities, unrealized loss position due to credit	$ 0
Allowance for credit losses on available for sale debt securities	0
Accrued interest receivable on securities	4,600,000		$ 4,400,000
Unrealized loss on transfer of securities to held to maturity	(27,800,000)
Gain (loss) on transfer of securities to held-to-maturity	0
Unrealized losses are related to credit losses	0
Securities pledged
Securities available-for-sale:
Carrying amount of securities pledged	$ 651,100,000		$ 727,800,000
Financial Instrument, Owned, Pledged Status [Extensible Enumeration]	Securities pledged		Securities pledged
Carrying Amount
Securities available-for-sale:
Securities available-for-sale transferred to held-to-maturity	$ 400,000,000.0
Securities held-to-maturity	591,403,000		$ 179,309,000
Fair Value
Securities available-for-sale:
Securities available-for-sale transferred to held-to-maturity	372,200,000
Securities held-to-maturity	511,054,000		177,354,000
Agency collateralized mortgage obligations ("CMOs")
Securities available-for-sale:
Securities held-to-maturity	189,118,000		60,054,000
Agency Notes
Securities available-for-sale:
Securities held-to-maturity	74,889,000
Pass-through mortgage-backed securities ("MBS") issued by government sponsored entities ("GSEs")
Securities available-for-sale:
Securities held-to-maturity	238,334,000		117,300,000
Available for sale debt securities, unrealized loss position due to credit	$ 252,655,000		$ 427,382,000