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EMPLOYEE BENEFIT PLANS
9 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
Defined benefit pension expense (income) included in Other Income (Expense), net was as follows:
 Three Months Ended June 30,Nine Months Ended June 30,
 2021202020212020
Interest cost$745 $1,148 $2,234 $3,450 
Expected return on plan assets(2,544)(2,585)(7,633)(7,757)
Amortization:    
Prior service cost— — 11 
Recognized actuarial loss1,573 1,042 4,719 3,126 
Net periodic expense (income)$(226)$(392)$(680)$(1,170)