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FAIR VALUE MEASUREMENTS - Summary (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Available-for-sale securities
Fair Value	$ 55,700	$ 54,101
Fair Value, Measurements, Recurring | Quoted prices in active markets for identical assets, Level 1
Assets:
Trading securities
Available-for-sale securities
Assets, Total
Fair Value, Measurements, Recurring | Quoted prices in active markets for identical assets, Level 1 | Municipal Obligations
Available-for-sale securities
Fair Value
Fair Value, Measurements, Recurring | Quoted prices in active markets for identical assets, Level 1 | Corporate Obligations
Available-for-sale securities
Fair Value
Fair Value, Measurements, Recurring | Significant other observable inputs, Level 2
Assets:
Trading securities	5,898	6,510
Available-for-sale securities
Assets, Total	55,700	54,101
Fair Value, Measurements, Recurring | Significant other observable inputs, Level 2 | Municipal Obligations
Available-for-sale securities
Fair Value	53,385	49,832
Fair Value, Measurements, Recurring | Significant other observable inputs, Level 2 | Corporate Obligations
Available-for-sale securities
Fair Value	2,315	4,269
Fair Value, Measurements, Recurring | Significant unobservable inputs, Level 3
Assets:
Trading securities
Available-for-sale securities
Assets, Total
Fair Value, Measurements, Recurring | Significant unobservable inputs, Level 3 | Municipal Obligations
Available-for-sale securities
Fair Value
Fair Value, Measurements, Recurring | Significant unobservable inputs, Level 3 | Corporate Obligations
Available-for-sale securities
Fair Value

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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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 Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 1

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph b

-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.



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-Publisher FASB

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-Paragraph 12

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-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.



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