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EMPLOYEE BENEFIT PLANS (Tables)
 6 Months Ended
Mar. 31, 2018
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,
 
2018
 
2017
 
2018
 
2017
Interest cost
$
1,407

 
$
1,402

 
$
2,814

 
$
2,804

Expected return on plan assets
(2,684
)
 
(2,736
)
 
(5,368
)
 
(5,472
)
Amortization:
 

 
 

 
 

 
 

Prior service cost
4

 
4

 
8

 
8

Recognized actuarial loss
525

 
832

 
1,050

 
1,664

Net periodic expense (income)
$
(748
)
 
$
(498
)
 
$
(1,496
)
 
$
(996
)