Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details)

v3.20.4
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivatives    
Interest expense $ 7,728 $ 9,240
Income before income tax 1,988 (15,703)
Income taxes (3,980) 5,397
Net loss (1,992) (10,306)
Prior service credit    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income tax 108 70
Actuarial losses    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income tax (3,021) (2,387)
Post-retirement benefit plans    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income tax (2,913) (2,317)
Net income (2,124) (1,727)
Derivatives    
Income taxes (789) (590)
Derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net income (682) 275
Derivatives | Reclassification out of Accumulated Other Comprehensive Income    
Derivatives    
Income before income tax (903) 364
Income taxes 221 (89)
Net loss (682) 275
Derivatives | Interest rate swap contracts | Reclassification out of Accumulated Other Comprehensive Income    
Derivatives    
Interest expense $ (903) $ 364