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INVESTMENT SECURITIES (Unrealized Gains and Losses by Category) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Securities Available-for-Sale, Amortized Cost
12 months or more	$ 1,012,881	$ 1,017,108
Less than 12 months	235,275	114,099
Amortized Cost	1,248,156	1,131,207
Securities Available-for-Sale, Unrealized Loss
12 months or more	107,559	91,590
Less than 12 months	4,538	383
Total	112,097	91,973
Securities Available-for-Sale, Fair Value
12 months or more	905,322	925,518
Less than 12 months	230,737	113,716
Total	1,136,059	1,039,234
FNMA and FHLMC certificates
Securities Available-for-Sale, Amortized Cost
12 months or more	737,230	731,334
Less than 12 months	197,672	106,235
Amortized Cost	934,902	837,569
Securities Available-for-Sale, Unrealized Loss
12 months or more	67,814	56,847
Less than 12 months	4,132	331
Total	71,946	57,178
Securities Available-for-Sale, Fair Value
12 months or more	669,416	674,487
Less than 12 months	193,540	105,904
Total	862,956	780,391
GNMA certificates
Securities Available-for-Sale, Amortized Cost
12 months or more	267,882	275,669
Less than 12 months	37,603	7,864
Amortized Cost	305,485	283,533
Securities Available-for-Sale, Unrealized Loss
12 months or more	39,458	34,364
Less than 12 months	406	52
Total	39,864	34,416
Securities Available-for-Sale, Fair Value
12 months or more	228,424	241,305
Less than 12 months	37,197	7,812
Total	265,621	249,117
CMOs issued by US Government-sponsored agencies
Securities Available-for-Sale, Amortized Cost
12 months or more	7,686	9,986
Amortized Cost	7,686	9,986
Securities Available-for-Sale, Unrealized Loss
12 months or more	285	376
Total	285	376
Securities Available-for-Sale, Fair Value
12 months or more	7,401	9,610
Total	7,401	9,610
Other debt securities
Securities Available-for-Sale, Amortized Cost
12 months or more	83	119
Amortized Cost	83	119
Securities Available-for-Sale, Unrealized Loss
12 months or more	2	3
Total	2	3
Securities Available-for-Sale, Fair Value
12 months or more	81	116
Total	$ 81	$ 116

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