Cash, Cash Equivalents And Short-Term Investments (Contractual Maturities Of Short-Term Investments Designated As Available-For-Sale) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	$ 153,484
Fair Value, Due in less than 1 year	149,862
Adjusted Cost, Due in 1 to 5 years	15,741
Fair Value, Due in 1 to 5 years	14,326
Adjusted Cost, Total	169,225
Fair Value, Total	164,188
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	5,118
Fair Value, Due in less than 1 year	5,120
Adjusted Cost, Due in 1 to 5 years	1,495
Fair Value, Due in 1 to 5 years	1,495
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	9,181
Fair Value, Due in less than 1 year	9,189
U.S. Treasuries And Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	109,390
Fair Value, Due in less than 1 year	109,393
Adjusted Cost, Due in 1 to 5 years	4,403
Fair Value, Due in 1 to 5 years	4,395
Foreign Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	26,725
Fair Value, Due in less than 1 year	23,090
Adjusted Cost, Due in 1 to 5 years	9,843
Fair Value, Due in 1 to 5 years	8,436
Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	3,070
Fair Value, Due in less than 1 year	$ 3,070

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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+ Details

- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth 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.

+ References+ Details

- Definition

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

- Definition

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.

+ References+ Details