EQUITY INSTRUMENTS (Summary of Restricted Stock Activity) (Details) - Restricted Stock [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
Nonvested, beginning of period (in Shares)	422	686	830
Granted (in Shares)	89	116	312
Vested (in Shares)	(183)	(303)	(293)
Forfeited (in Shares)	(52)	(77)	(163)
Nonvested, end of period (in Shares)	276	422	686
Weighted-Average Grant-Date Fair Value
Weighted-Average Grant Date-Fair Value, Nonvested (in Dollars per share)	$ 13.56	$ 12.17	$ 13.71
Weighted-Average Grant-Date Fair Value, Granted (in Dollars per share)	19.72	14.99	8.84
Weighted-Average Grant-Date Fair Value, Vested (in Dollars per share)	11.30	11.31	12.72
Weighted-Average Grant-Date Fair Value, Forfeited (in Dollars per share)	13.51	12.21	12.64
Weighted-Average Grant Date-Fair Value, Nonvested (in Dollars per share)	$ 17.05	$ 13.56	$ 12.17
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Nonvested	$ 5,958