CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 21,205	$ 153,543	$ 37,207	$ 357,151
Other comprehensive income (loss), net of income taxes:
Unrealized depreciation on securities, net of income taxes of ($0.9) million and ($7.9) million at March 31, 2016 and $(0.8) million and $(27.4) million at March 31, 2015	(1,453)	(1,203)	(12,463)	(43,447)
Minimum pension liability adjustments, net of income taxes of $0.2 million and $0.4 million at March 31, 2016 and $0.1 million and $0.2 million at March 31, 2015	313	197	626	393
Other comprehensive income (loss)	(1,140)	(1,006)	(11,837)	(43,054)
Comprehensive income (loss)	$ 20,065	$ 152,537	$ 25,370	$ 314,097