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Investments (Contractual Maturities of Marketable Investments) (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |
Within One Year | $ 433,620
After One, Within Five Years | 400,226
After Five, Within Ten Years | 0
After Ten Years | 0
Total | 833,846
Municipal Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Within One Year | 53,012
After One, Within Five Years | 196,697
After Five, Within Ten Years | 0
After Ten Years | 0
Total | 249,709
Corporate Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Within One Year | 26,042
After One, Within Five Years | 166,018
After Five, Within Ten Years | 0
After Ten Years | 0
Total | 192,060
U.S. Agency Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Within One Year | 8,065
After One, Within Five Years | 31,409
After Five, Within Ten Years | 0
After Ten Years | 0
Total | 39,474
Non-U.S. certificates of deposit [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Within One Year | 345,000
After One, Within Five Years | 0
After Five, Within Ten Years | 0
After Ten Years | 0
Total | 345,000
Non-U.S. Government Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Within One Year | 1,501
After One, Within Five Years | 6,102
After Five, Within Ten Years | 0
After Ten Years | 0
Total | $ 7,603

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- Definition Amount of available-for-sale debt securities at fair value maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 + Details
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- Definition Amount of available-for-sale debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 + Details
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- Definition Amount of available-for-sale debt securities at fair value maturing after the tenth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 + Details
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