CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (PARENTHETICALS) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Cash Dividends Paid Per Share [Abstract]
Cash dividends per share	$ 1.38	$ 1.36	$ 1.34
Treasury Locks, Tax Amount	$ (5,388)	$ (16,850)	$ 1,193
Unrealized holding gains on investments, Tax Amount	1,881	(953)	1,025
Cash Flow Hedges, Tax Amount	$ 5,029	$ 3,355	$ (4,452)