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PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Benefit Payments) (Details)
$ in Thousands
Sep. 30, 2018
USD ($)
Pension Benefits  
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]  
2018 $ 4,592
2019 11,889
2020 11,687
2021 11,337
2022 11,160
2023-2027 50,628
Total 101,293
Other Benefits  
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]  
2018 37
2019 148
2020 146
2021 143
2022 139
2023-2027 611
Total $ 1,224