EQUITY INSTRUMENTS (Schedule of Share-Based Compensation, Stock Options Activity) (Details) - Stock Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Stock options outstanding, beginning of period (in Shares)	892	794	634
Stock options granted (in Shares)	194	179	536
Stock options exercised (in Shares)	(335)	(32)	(1)
Stock options forfeited (in Shares)	(25)	(49)	(375)
Stock options outstanding, end of period (in Shares)	726	892	794
Stock options exercisable (vested) (in Shares)	131
Stock options expected to vest (in Shares)	712
Weighted-Average Exercise Price Per Share
Weighted average price per share, stock options outstanding (in Dollars per Share)	$ 9.97	$ 8.91	$ 11.92
Weighted average price per share, stock options granted (in Dollars per Share)	19.82	14.95	8.68
Weighted average price per share, stock options exercised (in Dollars per Share)	9.50	9.60	0.58
Weighted average price per share, stock options forfeited (in Dollars per Share)	16.54	11.16	13.70
Weighted average price per share, stock options outstanding (in Dollars per Share)	12.60	$ 9.97	$ 8.91
Weighted average price per share, stock options exercisable (vested) (in Dollars per Share)	8.56
Weighted average price per share, stock options expected to vest (in Dollars per Share)	$ 12.60
Weighted-Average Remaining Contractual Life (in Years)
Weighted average remaining contractual life stock options outstanding (in Duration)	4 years 11 months 1 day
Weighted average remaining contractual life, stock options exercisable (vested) (in Duration)	4 years 2 months 16 days
Weighted average remaining contractual life, stock options expected to vest (in Duration)	4 years 11 months 1 day
Aggregate Intrinsic Value
Aggregate intrinsic value, stock options outstanding	$ 6,563
Aggregate intrinsic value, stock options exercisable (vested)	1,709
Aggregate intrinsic value, stock options expected to vest	$ 6,432