SECURITIES - Summary of HTM Securities Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Mar. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 862,544	$ 847,036
Gross Unrealized Loss	(89,483)	(80,129)
Estimated Fair Value	773,061	766,907
Amount of debt securities available for sale reclassified to held to maturity	917,000
Unrealized gain (loss) on transfer of available for sale securities to held to maturity	600
Agency Mortgage-backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	862,544	847,036
Gross Unrealized Loss	(89,483)	(80,129)
Estimated Fair Value	$ 773,061	$ 766,907