SECURITIES - Summary of Available For Sale Securities With Unrealized And Unrecognized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	$ 4,283	$ 9,806
Fair Value, Losses 12 Months or More	63,971	115,748
Fair Value, Total	68,254	125,554
Unrealized Losses, Losses less than 12 Months	1	16
Unrealized Losses, Losses 12 Months or More	754	907
Unrealized Losses, Total	755	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	5,566	22,987
Fair Value, Total	5,566	22,987
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	11	224
Unrealized Losses, Total	11	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	0	0
Fair Value, Losses 12 Months or More	20,901	28,235
Fair Value, Total	20,901	28,235
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	598	147
Unrealized Losses, Total	598	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	17,116	29,930
Fair Value, Total	17,116	29,930
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	71	107
Unrealized Losses, Total	71	107
Mortgage-backed securities - commercial
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	4,283	9,306
Fair Value, Losses 12 Months or More	10,724	19,130
Fair Value, Total	15,007	28,436
Unrealized Losses, Losses less than 12 Months	1	16
Unrealized Losses, Losses 12 Months or More	51	207
Unrealized Losses, Total	52	223
Corporate obligations
Schedule of Trading Securities and Other Trading Assets [Line Items]
Fair value, Losses less than 12 Months	0	500
Fair Value, Losses 12 Months or More	9,664	10,572
Fair Value, Total	9,664	11,072
Unrealized Losses, Losses less than 12 Months	0	0
Unrealized Losses, Losses 12 Months or More	23	149
Unrealized Losses, Total	$ 23	$ 149