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INVESTMENTS (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
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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

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- 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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- 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 + Details
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