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SECURITIES (Securities Debt Maturities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]    
Trading Securities, Amortized Cost, Maturing in one year or less $ 0  
Trading Securities, Amortized Cost, Maturing after one year through five years 0  
Trading Securities, Amortized Cost, Maturing after five years through ten years 0  
Debt Securities, Trading, Debt Maturities, After Year Ten, Amortized Cost Basis 27,203  
Debt Securities, Trading, Amortized Cost 27,203 $ 27,203
Trading Securities, Fair Value, Maturing in one year or less 0  
Trading Securities, Fair Value, Maturing after one year through five years 0  
Trading Securities, Fair Value, Maturing after five years through ten years 0  
Debt Securities, Trading, Debt Maturities, After Year Ten, Fair Value 28,591  
Trading Securities, Fair Value 28,591 28,694
Available-for-sale Securities, Amortized Cost, Maturing in one year or less 8,110  
Available-for-sale Securities, Amortized Cost, Maturing after one year through five years 207,623  
Available-for-sale Securities, Amortized Cost, Maturing after five years through ten years 471,431  
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 2,353,047  
Debt Securities, Available-for-sale, Amortized Cost, Total 3,040,211 3,218,777
Available-for-sale Securities, Fair Value, Maturing in one year or less 8,029  
Available-for-sale Securities, Fair Value, Maturing after one year through five years 192,942  
Available-for-sale Securities, Fair Value, Maturing after five years through ten years 422,224  
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 2,030,665  
Debt Securities, Available-for-sale 2,653,860 2,789,031
Held-to-maturity Securities, Amortized Cost, Maturing in one year or less 22,368  
Held-to-maturity Securities, Amortized Cost, Maturing after one year through five years 22,945  
Held-to-maturity Securities, Amortized Cost, Maturing after five years through ten years 25,643  
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 1,039,003  
Held-to-maturity Securities, Amortized Cost 1,109,959 1,117,967
Held-to-maturity Securities, Fair Value, Maturing in one year or less 22,157  
Held-to-maturity Securities, Fair Value, Maturing after one year through five years 22,417  
Held-to-maturity Securities, Fair Value, Maturing after five years through ten years 24,866  
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 887,622  
Debt Securities, Held-to-maturity, Fair Value $ 957,062 $ 942,180