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