SECURITIES (Schedule of Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 2,523,968	$ 2,729,980
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3,380	2,074
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	289,409	358,271
Debt Securities, Available-for-Sale	2,237,939	2,373,783
Held-to-maturity Securities, Amortized Cost	1,014,210	1,059,387
Held-to-maturity Securities, Gross Unrealized Gains	127	687
Held-to-maturity Securities, Gross Unrealized Losses	134,752	152,228
Securities—held-to-maturity	879,278	907,514
Allowance for Credit Losses	(307)	(332)
debt securities, held-to-maturity, accrued interest receivable	3,800	4,500
Debt Securities, Available-for-Sale, Accrued Interest Receivable	10,100	10,800
U.S. Government and agency obligations
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	8,897	34,929
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	412	740
Debt Securities, Available-for-Sale	8,485	34,189
Held-to-maturity Securities, Amortized Cost	304	307
Held-to-maturity Securities, Gross Unrealized Gains	1	0
Held-to-maturity Securities, Gross Unrealized Losses	4	5
Securities—held-to-maturity	301	302
Allowance for Credit Losses	0	0
Municipal bonds
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	154,029	161,264
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,266	832
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	25,159	29,191
Debt Securities, Available-for-Sale	130,136	132,905
Held-to-maturity Securities, Amortized Cost	443,074	466,032
Held-to-maturity Securities, Gross Unrealized Gains	126	687
Held-to-maturity Securities, Gross Unrealized Losses	49,814	53,563
Securities—held-to-maturity	393,238	412,999
Allowance for Credit Losses	(148)	(157)
Corporate bonds
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	131,354	131,291
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	8,073	12,168
Debt Securities, Available-for-Sale	123,281	119,123
Held-to-maturity Securities, Amortized Cost	2,689	2,781
Held-to-maturity Securities, Gross Unrealized Gains	0	0
Held-to-maturity Securities, Gross Unrealized Losses	8	20
Securities—held-to-maturity	2,522	2,586
Allowance for Credit Losses	(159)	(175)
Mortgage-backed or related securities
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2,030,089	2,179,947
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,872	942
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	255,764	314,175
Debt Securities, Available-for-Sale	1,776,197	1,866,714
Held-to-maturity Securities, Amortized Cost	568,143	590,267
Held-to-maturity Securities, Gross Unrealized Gains	0	0
Held-to-maturity Securities, Gross Unrealized Losses	84,926	98,640
Securities—held-to-maturity	483,217	491,627
Allowance for Credit Losses	0	0
Asset-backed securities
Schedule of Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	199,599	222,549
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	242	300
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	1	1,997
Debt Securities, Available-for-Sale	$ 199,840	$ 220,852