Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

v3.21.2
Fair Value Measurements (Details) - Fair Value, Inputs, Level 2 - Fair Value, Recurring - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Commodity swap contracts      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assets $ 1,812 $ 0  
Liabilities:   0 $ 503
Interest rate swap contracts      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Liabilities:   $ 845 $ 1,708