Quarterly report pursuant to Section 13 or 15(d)

SECURITIES (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details)

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SECURITIES (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2015
Sep. 30, 2016
Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity   $ 200,839 $ 205,374
Estimated Fair Value   209,717 209,437
Held to maturity securities unrealized gains before tax $ 8,100 5,600 6,800
Obligations of States and Political Subdivisions      
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity   200,839 205,374
Gross Unrealized Gains   8,959 5,748
Gross Unrealized (Losses)   (81) (1,685)
Estimated Fair Value   $ 209,717 $ 209,437