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 12 Months Ended
Mar. 31, 2017
Jun. 30, 2015
Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity $ 203,478   $ 201,526
Estimated Fair Value 205,611   202,315
Held to maturity securities unrealized gains before tax 4,800 $ 8,100 5,200
Obligations of States and Political Subdivisions      
Schedule of Held-to-maturity Securities [Line Items]      
Total securities held to maturity 203,478   201,526
Gross Unrealized Gains 2,409   1,617
Gross Unrealized (Losses) (276)   (828)
Estimated Fair Value $ 205,611   $ 202,315