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INVESTMENTS (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Disclosure of underlying contractual maturities of investments
Amortized Cost	$ 412,039	$ 115,952
Fair Value	412,087	118,424
U.S. Treasuries | Less than 1 year
Disclosure of underlying contractual maturities of investments
Amortized Cost		16,040
Fair Value		16,040
Certificates of deposit | Less than 1 year
Disclosure of underlying contractual maturities of investments
Amortized Cost	22,045	2,201
Fair Value	22,045	2,201
Commercial paper | Less than 1 year
Disclosure of underlying contractual maturities of investments
Amortized Cost	5,991
Fair Value	5,991
Municipal securities | Less than 1 year
Disclosure of underlying contractual maturities of investments
Amortized Cost	367,819	77,038
Fair Value	367,867	77,027
Auction rate securities | Due 11 - 20 years
Disclosure of underlying contractual maturities of investments
Amortized Cost	11,102	10,748
Fair Value	11,102	10,748
Auction rate securities | Due 21 - 30 years
Disclosure of underlying contractual maturities of investments
Amortized Cost	5,082	9,925
Fair Value	$ 5,082	$ 12,408

X

- Definition

This item represents the cost of debt and equity securities net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

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X

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560

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