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 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2017
Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity   $ 205,630 $ 201,526
Estimated Fair Value   211,446 202,315
Held to maturity securities unrealized gains before tax $ 8,100 4,400 5,200
Obligations of States and Political Subdivisions      
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity   205,630 201,526
Gross Unrealized Gains   5,909 1,617
Gross Unrealized (Losses)   (93) (828)
Estimated Fair Value   $ 211,446 $ 202,315