FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Fair Value Measurement Inputs and Valuation Techniques (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	Mar. 31, 2020 USD ($)
Observed market comparable transactions
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 70,714
Fair market value of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned	$ 4,825
Fair market value of collateral | Costs to sell | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input	0.100
Fair market value of collateral | Costs to sell | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input	0.200
Fair market value of collateral | Costs to sell | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, input	0.100