Annual report pursuant to Section 13 and 15(d)

STOCK COMPENSATION PLANS STOCK COMPENSATION PLANS (Incentive Plan Details) (Details)

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STOCK COMPENSATION PLANS STOCK COMPENSATION PLANS (Incentive Plan Details) (Details) - shares
3 Months Ended 12 Months Ended
Feb. 09, 2015
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of performance shares granted             3,769,700    
Performance Shares [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of performance shares granted 410,105 464,470 400,000 199,450 106,120 230,265 874,575 1,233,685 806,271
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Estimated Forfeitures   96,149 27,774 32,653 16,351 142,017 111,877    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest   368,321 372,226 166,797 89,769 88,248 298,228