CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 174,570	$ 151,080	$ 347,752	$ 310,683
Other comprehensive income (loss), net of income taxes:
Unrealized appreciation (depreciation) on securities, net of income taxes of ($2.3) million and ($4.3) million at March 31, 2014 and $21.9 million and $21.8 million at March 31, 2013	(3,552)	37,516	(6,513)	37,382
Reclassification of realized gains in net income, net of income taxes of ($8.5) million at March 31, 2014	(12,884)		(12,884)
Minimum pension liability adjustments, net of income taxes of $0.1 million and $0.2 million at March 31, 2014 and $0.3 million and $0.5 million at March 31, 2013	145	432	292	865
Other comprehensive income (loss)	(16,291)	37,948	(19,105)	38,247
Comprehensive income	$ 158,279	$ 189,028	$ 328,647	$ 348,930