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OTHER ASSETS (Schedule of Other Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
OTHER ASSETS [Abstract]    
Nonmarketable investment securities $ 3,735 $ 1,650
Accrued interest receivable 3,502 2,675
Deferred income taxes 1,935 7,040
Prepaid expenses 1,475 1,148
Cash surrender value of life insurance 3,637 2,589
Other assets 3,636 3,781
Total $ 17,920 $ 18,883