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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (33,656)	$ 482,672	$ (128,212)
Other comprehensive income (loss), net of income taxes:
Unrealized appreciation (depreciation) on securities, net of income taxes of $3.3 million at September 30, 2018 and ($0.5) million at September 30, 2017	0	9,001	(829)
Minimum pension liability adjustments, net of income taxes of ($3.5) million at September 30, 2019, $1.9 million at September 30, 2018 and $1.9 million at September 30, 2017	(11,875)	5,249	3,333
Net current-period other comprehensive loss	(11,875)	14,250	2,504
Comprehensive income (loss)	$ (45,531)	$ 496,922	$ (125,708)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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