Impairment of Assets Held for Sale (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2019	Jan. 31, 2020
Impairment of assets held for sale	$ 37,902
Renewable Power Systems [Member]
Non-cash impairment charge	23,464
Total assets held for sale, net of valuation allowance	22,136
Total liabilities held for sale	10,186
Impairment of assets held for sale	37,902
Renewable Power Systems [Member] \| Level 3 [Member]
Net assets held for sale	$ 11,950
Renewable Power Systems [Member] \| AURELIUS Group [Member] \| Subsequent Event [Member]
Purchase price		$ 23,400

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Fair value portion of assets classified as held for sale.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of.

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