Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT PLANS - Changes in Fair Value of Level 3 Plan Assets (Details)

v3.19.3
PENSION AND OTHER POSTRETIREMENT PLANS - Changes in Fair Value of Level 3 Plan Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Fair value, beginning of year $ 158,662  
Fair value, end of year 155,313 $ 158,662
Level 3    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Fair value, beginning of year 10,115  
Fair value, end of year 10,860 10,115
Pension    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Fair value, beginning of year 158,662 155,634
Fair value, end of year 155,313 158,662
Pension | Level 3    
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]    
Fair value, beginning of year 10,115 9,480
Acquisitions 4,162 0
Dispositions (2,786) (149)
Realized Gains 685 261
Unrealized Gains (Losses) (1,316) 523
Fair value, end of year $ 10,860 $ 10,115