Annual report pursuant to Section 13 and 15(d)

STOCK COMPENSATION PLANS (Approved Grants) (Details)

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STOCK COMPENSATION PLANS (Approved Grants) (Details) - shares
3 Months Ended 12 Months Ended
Feb. 21, 2018
Jun. 26, 2017
Feb. 21, 2017
Dec. 31, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted         1,498,386    
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted 675,599 249,106 553,725   675,599 802,831 0
A&R 2015 Equity Plan [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted         675,599    
A&R 2015 Equity Plan [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross         685,599 532,358  
2015 Equity Plan [Member] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted         249,106   0
2015 Equity Plan [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross             3,406,716
Amended 2015 Equity Plan [Domain] | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted           553,725  
Amended 2015 Equity Plan [Domain] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross           553,725  
2012 Equity Plan [Member] | Employee Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of performance shares granted       250,000   412,710