SECURITIES (Securities Debt Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
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	27,886
Trading Securities, Fair Value	27,886	26,981
Available-for-sale Securities, Amortized Cost, Maturing in one year or less	2,415
Available-for-sale Securities, Amortized Cost, Maturing after one year through five years	274,688
Available-for-sale Securities, Amortized Cost, Maturing after five years through ten years	707,130
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	2,407,239
Debt Securities, Available-for-sale, Amortized Cost, Total	3,391,472	3,653,160
Available-for-sale Securities, Fair Value, Maturing in one year or less	2,415
Available-for-sale Securities, Fair Value, Maturing after one year through five years	266,205
Available-for-sale Securities, Fair Value, Maturing after five years through ten years	672,333
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	2,153,469
Debt Securities, Available-for-sale	3,094,422	3,638,993
Held-to-maturity Securities, Amortized Cost, Maturing in one year or less	8,970
Held-to-maturity Securities, Amortized Cost, Maturing after one year through five years	42,855
Held-to-maturity Securities, Amortized Cost, Maturing after five years through ten years	25,284
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10	1,075,080
Held-to-maturity Securities, Amortized Cost	1,152,189	521,355
Held-to-maturity Securities, Fair Value, Maturing in one year or less	8,971
Held-to-maturity Securities, Fair Value, Maturing after one year through five years	42,572
Held-to-maturity Securities, Fair Value, Maturing after five years through ten years	24,832
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	959,926
Debt Securities, Held-to-maturity, Fair Value	$ 1,036,301	$ 541,853