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DEFINED BENEFIT PENSION EXPENSE (Details) - Summary of Defined Benefit Pension Expense - USD ($)
3 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]    
Interest cost $ 1,407,000 $ 1,402,000
Expected return on plan assets (2,684,000) (2,736,000)
Amortization:    
Prior service cost 4,000 4,000
Recognized actuarial loss 525,000 832,000
Pension settlement (13,715,000) 0
Net periodic expense (income) 12,967,000 $ (498,000)
Life insurance benefits 9,600  
Life insurance receivables $ 7,800