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Impairment of Assets Held for Sale (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Jan. 31, 2020
Impairment of assets held for sale	$ 37,902
Disposal Groups [Member]
Non-cash impairment charge	24,092
Total assets held for sale, net of valuation allowance	23,941
Total liabilities held for sale	14,274
Impairment of assets held for sale	37,902
Disposal Groups [Member] \| Level 3 [Member]
Net assets held for sale	$ 9,667
Disposal Groups [Member] \| AURELIUS Group [Member]
Purchase price			$ 23,400
Promissory note			$ 6,000
Disposal Groups [Member] \| AURELIUS Group [Member] \| Germany, Poland And Bulgaria [Member]
Sales		$ 80,000