Property, Plant, and Equipment (Secured Financings) (Details) - Equipment Financings [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Property, plant and equipment gross [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	$ 71,403	$ 50,819
Property, plant and equipment net [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	60,718	44,693
Machinery and equipment | Property, plant and equipment gross [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	63,305	48,288
Machinery and equipment | Property, plant and equipment net [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	52,620	42,162
Construction in process | Property, plant and equipment gross [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	8,098	2,531
Construction in process | Property, plant and equipment net [Member]
Debt Instrument [Line Items]
Pledged Assets, Not Separately Reported, Other	$ 8,098	$ 2,531