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Revenue (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020
Noncurrent unbilled receivables	$ 12,053		$ 16,751
Revenue from contract liabilities	$ 6,528	$ 3,970
Net Sales [Member] | Manufactured Products [Member]
Percentage of attributable to revenue	87.00%	87.00%
Net Sales [Member] | MRO Products [Member]
Percentage of attributable to revenue	12.00%	12.00%
Net Sales [Member] | Service [Member]
Percentage of attributable to revenue	1.00%	1.00%

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