STOCKHOLDERS' EQUITY (Treasury Stock) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Treasury Stock
Aggregate cost of shares repurchased during the period	$ 3,611	$ 5,116
Stock Repurchase Program
Treasury Stock
Amount available for repurchase	$ 34,100		$ 37,700
Number of shares repurchased during the period	194,520
Aggregate cost of shares repurchased during the period	$ 3,600