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Commitments and Contingencies - Insurance Receivable Balance Sheet Rollforward (Details) - Quality Aluminum Forge, LLC Manufacturing Facility Fire
$ in Thousands
3 Months Ended
Dec. 31, 2019
USD ($)
Loss Contingencies [Line Items]  
Other receivable, beginning balance $ 3,500
Cash proceeds (4,500)
Other expenses 1,170
Business interruption 0
Other receivable, ending balance 170
Equipment  
Loss Contingencies [Line Items]  
Capital expenditures $ 0