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INVESTMENT SECURITIES (Schedule of Amortized Cost and Fair Value of Securities Classified by Contractual Maturity) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Held-to-maturity Securities, Amortized Cost |  |
Due within 1 year | $ 24,865 |
After 1 year through 5 years | 29,874 | $ 29,852
After 5 years though 10 years | 9,345 | 9,505
After 10 years | 451,529 | 471,068
Amortized Cost, total | 515,613 | 510,425
Held-to-maturity Securities, Fair Value |  |
Due within 1 year | 24,872 |
After 1 year through 5 years | 27,756 | 27,630
After 5 years though 10 years | 7,880 | 8,130
After 10 years | 381,925 | 401,530
Fair Value, total | 442,433 | 437,290
Available-for-sale Securities, Amortized Cost |  |
After 1 year through 5 years | 66,000 | 54,736
After 5 years though 10 years | 23,371 | 36,043
After 10 years | 424,115 | 443,886
Amortized Cost, total | 513,486 | 534,665
Available-for-sale Securities, Fair Value |  |
After 1 year through 5 years | 59,006 | 48,959
After 5 years though 10 years | 21,822 | 32,872
After 10 years | 345,240 | 363,916
Fair Value, total | 426,068 | 445,747
Asset Pledged as Collateral |  |
Available-for-sale Securities, Fair Value |  |
Securities pledged | 3,400,000 | 2,400,000
Asset Pledged as Collateral | FRB |  |
Available-for-sale Securities, Fair Value |  |
Securities pledged | $ 941,700 | $ 25,000

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