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FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES (Details 4) (USD $) | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended | 12 Months Ended |  | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012 | Jun. 30, 2013 Auction rate securities | Jun. 30, 2013 2011 ARS Agreement | Dec. 31, 2012 2011 ARS Agreement | Dec. 31, 2011 2011 ARS Agreement | Jun. 30, 2011 2011 ARS Agreement | Jun. 30, 2013 2011 ARS Agreement Subsequent event | Mar. 31, 2010 2010 ARS Agreement | Jun. 30, 2013 2011 Put Option | Oct. 02, 2013 2011 Put Option Maximum | Jul. 02, 2013 2011 Put Option Maximum | Mar. 31, 2012 2010 Put Option
ARS Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face value of investments |  |  |  |  |  | $ 19,500,000 |  |  |  |  |  |  |  |  |  |
Amortized Cost | 160,150,000 |  | 160,150,000 |  | 115,952,000 | 17,800,000 |  |  |  |  |  |  |  |  |  |
Trading auction rate securities, in short-term and long-term investments |  |  |  |  |  | 17,800,000 |  |  |  |  |  |  |  |  |  |
Impairment of investments, trading securities |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |
Amount of securities of par value |  |  |  |  |  |  |  |  |  | 24,500,000 |  | 54,200,000 |  | 1,000,000 | 1,000,000 |
Redemption of investment securities at par through normal market channels |  |  |  |  |  |  | 0 | 1,300,000 | 3,700,000 |  | 1,000,000 |  |  |  |  |
Fair market value of investments |  |  |  |  |  |  |  |  |  |  |  |  | 1,700,000 |  |  |
Redemption of investment securities through the exercise of the put option |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,700,000
Resulted (loss) gain on revaluation of investment securities included in other (expense) income | $ 100,000 | $ (30,000) | $ 2,600,000 | $ 400,000 |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 31 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 + Details
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