Cash, Cash Equivalents and Investments (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Contractual maturity of marketable debt investments
Marketable Investments, Debt Maturities, Within One Year, Amortized Cost	$ 13,124
Marketable Investments, Debt Maturities, Year One Through Three, Amortized Cost	35,938
Marketable investments, Debt Maturities, Amortized Cost, Total	49,062
Marketable Investments, Debt Maturities, Within One Year, Fair Value	13,115
Marketable Investments, Debt Maturities, Year One Through Three, Fair Value	35,925
Marketable Investments, Debt Maturities, Fair Value, Total	$ 49,040

Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References+ Details

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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+ Details