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INCOME TAXES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Income tax expense (benefit) reconciliation [Abstract]      
United States federal corporate tax rate (in hundredths) 35.00% 35.00%  
Computed expected income tax expense $ 2,954 $ 7,307  
Increases (decreases) in tax resulting from:      
Tax-exempt interest income (705) (695)  
Dividends received deduction (306) (425)  
Proration of tax-exempt interest and dividends received deduction 152 168  
Other, net (459) (132)  
Total income tax expense 1,636 $ 6,223  
Provision for uncertain tax positions $ 0   $ 0