INVESTMENT SECURITIES (Investment Securities at an Unrealized Loss Position) (Details) $ in Thousands	Jun. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Number of AFS investment securities in an unrealized loss position | security	229	208
Number of HTM investment securities in an unrealized loss position | security	83	82
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	$ 82,722	$ 19,557
Less Than 12 Months, Unrecognized Losses	(1,820)	(219)
12 Month or Longer, Fair Value	565,542	588,097
12 Month or Longer, Unrecognized Losses	(112,918)	(108,028)
Total Fair Value	648,264	607,654
Total Unrecognized Losses	114,738	108,247
Schedule of Held-to-Maturity Securities [Line Items]
Less Than 12 Months, Fair Value	8,048	8,853
Less Than 12 Months, Unrecognized Losses	(76)	(33)
12 Month or Longer, Fair Value	520,040	547,631
12 Month or Longer, Unrecognized Losses	(87,703)	(67,188)
Total Fair Value	528,088	556,484
Total Unrecognized Losses	(87,779)	(67,221)
States and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	8,438	534
Less Than 12 Months, Unrecognized Losses	(109)	(1)
12 Month or Longer, Fair Value	110,179	114,601
12 Month or Longer, Unrecognized Losses	(30,190)	(29,809)
Total Fair Value	118,617	115,135
Total Unrecognized Losses	30,299	29,810
Schedule of Held-to-Maturity Securities [Line Items]
Less Than 12 Months, Fair Value	0	0
Less Than 12 Months, Unrecognized Losses	0	0
12 Month or Longer, Fair Value	33,864	35,253
12 Month or Longer, Unrecognized Losses	(8,138)	(6,706)
Total Fair Value	33,864	35,253
Total Unrecognized Losses	(8,138)	(6,706)
Corporate securities
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	0	0
Less Than 12 Months, Unrecognized Losses	0	0
12 Month or Longer, Fair Value	31,463	31,414
12 Month or Longer, Unrecognized Losses	(4,029)	(4,317)
Total Fair Value	31,463	31,414
Total Unrecognized Losses	4,029	4,317
U.S. Treasury and other government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	26,659	2,893
Less Than 12 Months, Unrecognized Losses	(195)	(87)
12 Month or Longer, Fair Value	15,239	16,286
12 Month or Longer, Unrecognized Losses	(1,883)	(1,854)
Total Fair Value	41,898	19,179
Total Unrecognized Losses	2,078	1,941
Residential - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	19,271	0
Less Than 12 Months, Unrecognized Losses	(181)	0
12 Month or Longer, Fair Value	325,104	367,887
12 Month or Longer, Unrecognized Losses	(62,043)	(63,607)
Total Fair Value	344,375	367,887
Total Unrecognized Losses	62,224	63,607
Schedule of Held-to-Maturity Securities [Line Items]
Less Than 12 Months, Fair Value	8,048	8,853
Less Than 12 Months, Unrecognized Losses	(76)	(33)
12 Month or Longer, Fair Value	486,176	512,378
12 Month or Longer, Unrecognized Losses	(79,565)	(60,482)
Total Fair Value	494,224	521,231
Total Unrecognized Losses	(79,641)	(60,515)
Residential - Non-government agencies
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	5,437	0
Less Than 12 Months, Unrecognized Losses	(101)	0
12 Month or Longer, Fair Value	7,826	8,169
12 Month or Longer, Unrecognized Losses	(1,040)	(980)
Total Fair Value	13,263	8,169
Total Unrecognized Losses	1,141	980
Commercial - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	22,917	6,467
Less Than 12 Months, Unrecognized Losses	(1,234)	(1)
12 Month or Longer, Fair Value	60,595	44,447
12 Month or Longer, Unrecognized Losses	(13,600)	(7,403)
Total Fair Value	83,512	50,914
Total Unrecognized Losses	14,834	7,404
Commercial - Non-government agencies
Debt Securities, Available-for-Sale [Line Items]
Less than 12 months, Fair Value	0	9,663
Less Than 12 Months, Unrecognized Losses	0	(130)
12 Month or Longer, Fair Value	15,136	5,293
12 Month or Longer, Unrecognized Losses	(133)	(58)
Total Fair Value	15,136	14,956
Total Unrecognized Losses	$ 133	$ 188