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INVESTMENTS, SCHEDULED MATURITIES AND REALIZED GAINS AND LOSSES (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Debt Maturities Fair Value [Abstract]          
October 1, 2016 — September 30, 2017 $ 1,171,000   $ 1,171,000    
October 1, 2017 — September 30, 2021 0   0    
October 1, 2021 — September 30, 2026 0   0    
After September 30, 2026 9,911,000   9,911,000    
Available-for-sale investments 11,082,000   11,082,000   $ 15,507,000
Available-for-sale securities, gross realized gains 0 $ 0 0 $ 0  
Available-for-sale securities, gross realized losses $ 0 $ 0 $ 0 $ 0