Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 18,959	$ 500,106
Other comprehensive income (loss), net of income taxes:
Unrealized depreciation on securities, net of income taxes of $0.2 million at December 31, 2017		(601)
Minimum pension liability adjustments, net of income taxes of ($0.1) million at December 31, 2018, and ($0.1) million at December 31, 2017	225	340
Other comprehensive income (loss)	225	(261)
Comprehensive income (loss)	$ 19,184	$ 499,845