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RETIREMENT PLANS
 9 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
RETIREMENT PLANS
11.
RETIREMENT PLANS
 
A summary of net periodic benefit expense for the Company’s defined benefit plans for the three and six-month periods ended March 31, 2018 and 2017 is shown in the following table. Net periodic benefit cost for each period presented is comprised of the following:
 
 
 
Three Months
Ended June 30,
 
 
Nine Months
Ended June 30,
 
(In thousands)
 
2018
 
 
2017
 
 
2018
 
 
2017
 
Defined benefit plans
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest cost
 
$
821
 
 
 
737
 
 
 
2,461
 
 
 
2,438
 
Expected return on assets
 
 
(975
)
 
 
(942
)
 
 
(2,924
)
 
 
(2,978
)
Amortization of:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service cost
 
 
-
 
 
 
-
 
 
 
-
 
 
 
3
 
Actuarial loss
 
 
548
 
 
 
683
 
 
 
1,644
 
 
 
1,871
 
Net periodic benefit cost
 
$
394
 
 
 
478
 
 
 
1,181
 
 
 
1,334