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EMPLOYEE BENEFIT PLANS (Tables)
 6 Months Ended
Mar. 31, 2019
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures Defined benefit pension expense (income) was as follows:
 
Three Months Ended March 31,
 
Six Months Ended March 31,
 
2019
 
2018
 
2019
 
2018
Interest cost
$
1,571

 
$
1,407

 
$
3,141

 
$
2,814

Expected return on plan assets
(2,583
)
 
(2,639
)
 
(5,166
)
 
(5,278
)
Amortization:
 

 
 

 
 

 
 

Prior service cost
3

 
4

 
7

 
8

Recognized actuarial loss
222

 
346

 
444

 
692

Net periodic expense (income)
$
(787
)
 
$
(882
)
 
$
(1,574
)
 
$
(1,764
)