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DERIVATIVES - (Schedule of Cash Flow Hedges Included in Financial Statements) (Details) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Notional Amount $ 270,000,000.0 $ 270,000,000.0
Fair Value (8,166,000) (9,616,000)
Other Liabilities [Member]    
Derivative [Line Items]    
Notional Amount 270,000,000 270,000,000
Fair Value $ (8,166,000) $ (9,616,000)