STOCKHOLDERS' EQUITY (Treasury Stock) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Treasury Stock
Aggregate cost of shares repurchased during the period	$ 6,019	$ 7,594
Stock Repurchase Program
Treasury Stock
Amount available for repurchase	$ 31,700		$ 37,700
Number of shares repurchased during the period	286,179
Aggregate cost of shares repurchased during the period	$ 6,000