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
Mar. 31, 2016
Jun. 30, 2015
Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]      
Securities held to maturity, at carrying value [1] $ 204,444   $ 205,374
Held to maturity securities 210,349   209,437
Held to maturity securities unrealized gains before tax 6,400 $ 8,100  
Obligations of States and Political Subdivisions [Member]      
Schedule of Held-to-maturity Securities [Line Items]      
Securities held to maturity, at carrying value [1] 204,444   205,374
Gross Unrealized Gains 7,436   5,748
Gross Unrealized Losses (1,531)   (1,685)
Held to maturity securities $ 210,349   $ 209,437
[1] The carrying value includes $6.4 million of net unrealized gains present at the time of transfer from available for securities, net of any accretion.