Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation New Accounting Pronouncements Adopted (Details)

v3.19.1
Basis of Presentation New Accounting Pronouncements Adopted (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Oct. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Net benefit costs reclassified into other income (deductions), net $ (1,067) $ (1,596) $ (1,991) $ (3,680)  
Accounting Standards Update 2016-16          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Cumulative tax adjustment for intra-entity transfers         $ (4,176)
Cost of Sales | Accounting Standards Update 2017-07          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Adoption of ASU 2017-07   714   1,428  
Net benefit costs reclassified into other income (deductions), net   714   1,428  
Selling Expense | Accounting Standards Update 2017-07          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Adoption of ASU 2017-07   226   452  
Net benefit costs reclassified into other income (deductions), net   226   452  
Administrative Expense | Accounting Standards Update 2017-07          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Adoption of ASU 2017-07   485   970  
Net benefit costs reclassified into other income (deductions), net   $ 485   $ 970  
Retained Earnings | Accounting Standards Update 2016-16          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Cumulative tax adjustment for intra-entity transfers         (4,176)
Other Assets | Accounting Standards Update 2016-16          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Cumulative tax adjustment for intra-entity transfers         $ (4,176)