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DERIVATIVE FINANCIAL INSTRUMENTS (Details) - USD ($)
9 Months Ended
Jun. 25, 2019
Sep. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
DERIVATIVE FINANCIAL INSTRUMENTS        
Cash pledged   $ 960,000    
Securities pledged   12,758,000   $ 589,000
Interest rate swap | Variable-rate borrowings        
DERIVATIVE FINANCIAL INSTRUMENTS        
Notional amount   117,660,000   112,947,000
Interest rate swap | Cash flow hedge | Variable-rate borrowings        
DERIVATIVE FINANCIAL INSTRUMENTS        
Notional amount   17,000,000 $ 10,000,000 10,000,000
Amount received $ 174,000      
Unrealized gain   76,000    
Offsetting interest rate swap contracts        
DERIVATIVE FINANCIAL INSTRUMENTS        
Notional amount   $ 117,660,000   $ 112,947,000