SECURITIES AND OTHER INVESTMENTS (Amortized Cost of HTM Securities by Security Type and Credit Rating) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
HTM Securities, Amortized Cost	$ 827,135	$ 803,851
Moody's AAA/AA/A
HTM Securities, Amortized Cost	723,697	692,671
Moody's BBB/BB/B
HTM Securities, Amortized Cost	1,133	1,144
Moody's Not Rated - Agency
HTM Securities, Amortized Cost	63,430	64,595
Moody's Not Rated - Non-Agency
HTM Securities, Amortized Cost	38,875	45,441
US States and Political Subdivisions Debt Securities [Member]
HTM Securities, Amortized Cost	730,121	697,683
US States and Political Subdivisions Debt Securities [Member] \| Moody's AAA/AA/A
HTM Securities, Amortized Cost	719,386	686,923
US States and Political Subdivisions Debt Securities [Member] \| Moody's BBB/BB/B
HTM Securities, Amortized Cost	1,133	1,144
US States and Political Subdivisions Debt Securities [Member] \| Moody's Not Rated - Agency
HTM Securities, Amortized Cost	0	0
US States and Political Subdivisions Debt Securities [Member] \| Moody's Not Rated - Non-Agency
HTM Securities, Amortized Cost	9,602	9,616
Corporate Bond Securities [Member]
HTM Securities, Amortized Cost	2,978	3,322
Corporate Bond Securities [Member] \| Moody's AAA/AA/A
HTM Securities, Amortized Cost	0	0
Corporate Bond Securities [Member] \| Moody's BBB/BB/B
HTM Securities, Amortized Cost	0	0
Corporate Bond Securities [Member] \| Moody's Not Rated - Agency
HTM Securities, Amortized Cost	0	0
Corporate Bond Securities [Member] \| Moody's Not Rated - Non-Agency
HTM Securities, Amortized Cost	2,978	3,322
Collateralized Mortgage-Backed Securities [Member]
HTM Securities, Amortized Cost	94,036	102,846
Collateralized Mortgage-Backed Securities [Member] \| Moody's AAA/AA/A
HTM Securities, Amortized Cost	4,311	5,748
Collateralized Mortgage-Backed Securities [Member] \| Moody's BBB/BB/B
HTM Securities, Amortized Cost	0	0
Collateralized Mortgage-Backed Securities [Member] \| Moody's Not Rated - Agency
HTM Securities, Amortized Cost	63,430	64,595
Collateralized Mortgage-Backed Securities [Member] \| Moody's Not Rated - Non-Agency
HTM Securities, Amortized Cost	$ 26,295	$ 32,503