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Principles Of Preparation (Extraordinary Gain) (Details) (USD $)
12 Months Ended 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Sep. 30, 2010
Company's 6% Senior Notes
Extraordinary gain, net of income tax $ 0 $ 10,286,000 $ 10,300,000
Income tax expense related to extraordinary gain     $ 5,800,000
Debt Instrument, Interest Rate, Stated Percentage     6.00%
Debt instrument maturity year     2035