INVESTMENTS (Schedule of Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Adjusted Cost	$ 983us-gaap_InvestmentOwnedAtCost	$ 3,670us-gaap_InvestmentOwnedAtCost
Unrealized gains	83us-gaap_UnrealizedGainOnSecurities	83us-gaap_UnrealizedGainOnSecurities
Unrealized losses	0us-gaap_UnrealizedLossOnSecurities	(506)us-gaap_UnrealizedLossOnSecurities
Net unrealized (losses) gains	83us-gaap_UnrealizedGainLossOnSecurities	(423)us-gaap_UnrealizedGainLossOnSecurities
Fair value of investment	1,066us-gaap_InvestmentOwnedAtFairValue	3,247us-gaap_InvestmentOwnedAtFairValue
Short-term investments	0	2,181
Auction-rate securities	1,066us-gaap_LongTermInvestments	1,066us-gaap_LongTermInvestments
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Adjusted Cost	0	2,687
Fair value of investment	0	2,181
Auction Rate Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Adjusted Cost	983	983
Fair value of investment	$ 1,066	$ 1,066

Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 25

-Paragraph 1

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Cost of the investment.

+ References

No definition available.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

+ References

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

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-Name Regulation S-X (SX)

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-Section 13

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

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-Publisher SEC

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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- Definition

Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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The increase (decrease), resulting in a gain, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.

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The increase (decrease), resulting in a loss, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period.

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