FAIR VALUE DISCLOSURES AND REPORTING, THE FAIR VALUE OPTION AND FAIR VALUE MEASUREMENTS - Quantitative Information About Recurring Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Municipal securities
Quantitative Information About Recurring Fair Value Measurements [Line Items]
Fair Value	$ 20,104	$ 20,126
Valuation Technique	Discounted cash flow	Discounted cash flow
Significant Unobservable Inputs	Discount Rate	Discount Rate
Range of Inputs, Minimum	0.50%	0.50%
Range of Inputs, Maximum	2.00%	2.45%
Trust Preferred Securities [Member]
Quantitative Information About Recurring Fair Value Measurements [Line Items]
Fair Value	$ 218	$ 235
Valuation Technique	Discounted cash flow	Discounted cash flow
Significant Unobservable Inputs	Probability of default	Probability of default
Range of Inputs, Minimum	0.99%	1.08%
Range of Inputs, Maximum	2.39%	2.48%