Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Weighted Average Assumptions (Details)

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BENEFIT PLANS - Weighted Average Assumptions (Details)
3 Months Ended 5 Months Ended 7 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Jul. 31, 2014
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Pension Benefits            
Weighted-average assumptions used to determine benefit obligations            
Discount rate 4.54% 4.12%     4.54% 4.12%
Weighted-average assumptions used to determine net periodic benefit cost            
Discount Rate         4.12% 4.89%
Long-term Return on Assets         7.00% 7.25%
Post-Retirement Benefits            
Weighted-average assumptions used to determine benefit obligations            
Discount rate 3.81% 3.72%     3.81% 3.72%
Weighted-average assumptions used to determine net periodic benefit cost            
Discount Rate 3.77% 3.89% 4.27% 3.72% 3.73% 4.11%