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