SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Unrecognized Compensation Expense) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, Total/weighted-average	$ 30,789
Expected Weighted-Average Recognition (Years)	2 years 3 months 18 days
SOSARs/Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, SOSARs	$ 4,899	[1]
Expected Weighted-Average Recognition (Years)	1 year 9 months 18 days	[1]
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, shares	$ 20,965
Expected Weighted-Average Recognition (Years)	2 years 4 months 24 days
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, shares	$ 4,925
Expected Weighted-Average Recognition (Years)	2 years 7 months 6 days

[1] Stock-Only Stock Appreciation Rights (SOSARs)