Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Accumulated Other Comprehensive Income - Reclassifications out of AOCI (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2021
Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Cost of sales $ (291,122)     $ (238,469)     $ (828,424) $ (737,722)
Other income (deductions), net (2,442)     (2,776)     (6,760) (7,438)
Income before income tax 1,041     (4,360)     9,153 (117,724)
Income taxes 2,325     6,209     (2,627) 22,672
Net income (loss) 3,366 $ 5,152 $ (1,992) 1,849 $ (86,595) $ (10,306) 6,526 (95,052)
Post-retirement benefit plans                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Income taxes 761     573     2,186 1,652
Net income (loss) (2,358)     (1,743)     (6,737) (5,297)
Post-retirement benefit plans | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Income before income tax (3,119)     (2,316)     (8,923) (6,949)
Prior service credit | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Cost of sales 137     70     377 210
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Other income (deductions), net (2,730)     (2,386)     (8,774) (7,159)
Prior service cost write-off | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Other income (deductions), net (526)           (526)  
Derivatives | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Income before income tax (790)     (438)     (2,444) 108
Income taxes 194     108     599 (26)
Net income (loss) (596)     (330)     (1,845) 82
Derivatives | Interest rate swap contracts | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Interest expense $ 790     $ (438)     $ 2,444 $ 108