SECURITIES - Summary of Available For Sale Securities With Unrealized And Unrecognized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	$ 11,358	$ 9,806
Fair Value, Losses 12 Months or More	77,244	115,748
Fair Value, Total	88,602	125,554
Unrealized Losses, Losses less than 12 Months	15	16
Unrealized Losses, Losses 12 Months or More	2,169	907
Unrealized Losses, Total	2,184	923
U.S Treasury
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	0	0
Fair Value, Losses 12 Months or More	0	4,894
Fair Value, Total	0	4,894
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	0	73
Unrealized Losses, Total	0	73
Obligations of U.S. government agencies and sponsored entities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	0	0
Fair Value, Losses 12 Months or More	5,371	22,987
Fair Value, Total	5,371	22,987
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	62	224
Unrealized Losses, Total	62	224
Tax-exempt and taxable obligations of states and municipal subdivisions
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	2,571	0
Fair Value, Losses 12 Months or More	45,504	28,235
Fair Value, Total	48,075	28,235
Unrealized Losses, Losses less than 12 Months	5	0
Unrealized Losses, Losses 12 Months or More	1,586	147
Unrealized Losses, Total	1,591	147
Mortgage-backed securities - residential
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	0	0
Fair Value, Losses 12 Months or More	4,017	29,930
Fair Value, Total	4,017	29,930
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	80	107
Unrealized Losses, Total	80	107
Mortgage-backed securities - commercial
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	4,293	9,306
Fair Value, Losses 12 Months or More	12,532	19,130
Fair Value, Total	16,825	28,436
Unrealized Losses, Losses less than 12 Months	4	16
Unrealized Losses, Losses 12 Months or More	93	207
Unrealized Losses, Total	97	223
Corporate obligations
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	4,494	500
Fair Value, Losses 12 Months or More	9,820	10,572
Fair Value, Total	14,314	11,072
Unrealized Losses, Losses less than 12 Months	6	0
Unrealized Losses, Losses 12 Months or More	348	149
Unrealized Losses, Total	$ 354	$ 149