Annual report pursuant to Section 13 and 15(d)

Marketable Securities Continuous Unrealized Loss Position (Details)

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Marketable Securities Continuous Unrealized Loss Position (Details) (USD $)
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Investments, Fair Value and Gross Unrealized Losses
Net realized investment gains $ 600,000 $ 2,500,000 $ 4,000,000
Months in loss position not exceeding this period 12
Fair value 426,572,000
Gross unrealized losses, less than 12 months (762,000) [1]
Gross unrealized losses, 12 months or longer 0
US Treasury securities
Investments, Fair Value and Gross Unrealized Losses
Fair value 47093000年
Gross unrealized losses, less than 12 months (16,000) [1]
U.S. Government agency securities
Investments, Fair Value and Gross Unrealized Losses
Fair value 115,894,000
Gross unrealized losses, less than 12 months (76,000) [1]
Municipal securities
Investments, Fair Value and Gross Unrealized Losses
Fair value 38,399,000
Gross unrealized losses, less than 12 months (102,000) [1]
Corporate debt securities
Investments, Fair Value and Gross Unrealized Losses
Fair value 225,186,000
Gross unrealized losses, less than 12 months $ (568,000) [1]
[1] Of the total gross unrealized losses, there were no amounts that, as of June 30, 2012, had been in a continuous loss position for 12 months or more.
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