SECURITIES - Summary of HTM Securities Portfolio (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities
Amortized Cost	$ 734,863,000	$ 789,578,000
Gross Unrealized Gain		1,000
Gross Unrealized Loss	(59,095,000)	(79,558,000)
Allowance for Credit Losses	0
Estimated Fair Value	675,768,000	710,021,000
Agency mortgage-backed securities
Schedule of Held-to-maturity Securities
Amortized Cost	734,863,000	789,578,000
Gross Unrealized Gain		1,000
Gross Unrealized Loss	(59,095,000)	(79,558,000)
Estimated Fair Value	$ 675,768,000	$ 710,021,000