Amortized Cost Of Trading Securities Sold During Period.

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- Definition

Contractual maturity of auction rate securities in excess of years.

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- Definition

Interest reset date period.

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- Definition

Marketable securities fair value disclosures.

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- Definition

Period at which investors can hold investments at par or sell securities at auction provided there are willing buyers.

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, 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.

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-Publisher FASB

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-Paragraph 7

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Subparagraph (SX 210.5-02.2)

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- Definition

This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period.

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-Paragraph 21

-Subparagraph d

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-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 9

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- Definition

This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities.

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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.

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-Glossary Available-for-Sale Securities

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- Definition

The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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-Section 50

-Paragraph 2

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- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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- Definition

The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

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- Definition

The cash inflow associated with the sale or maturity (principal being due) of securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

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-Name Accounting Standards Codification

-Glossary Investing Activities

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- Definition

The total of financial instruments 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 debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Statement of Financial Accounting Standard (FAS)

-Number 159

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-Name Accounting Standards Codification

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Marketable Securities and Fair Value Disclosures (Details) (Textual) (USD $)	9 Months Ended			9 Months Ended			1 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Sep. 30, 2010 Auction rate securities [Member]	Sep. 30, 2011 Auction rate securities [Member]	Dec. 31, 2010 Auction rate securities [Member]	Jan. 31, 2010 Mutual funds [Member]	Dec. 31, 2009 Mutual funds [Member]	Sep. 30, 2011 Maximum [Member]	Sep. 30, 2011 Minimum [Member]
Marketable Securities Fair Value Disclosures (Textual) [Abstract]
Available-for-Sale Securities, Estimated fair value	$ 9,677,000		$ 10,130,000
Amortized cost of auction rate securities classified as trading securities sold				16,400,000
Trading securities	0		0
Excess of amortized cost over fair value of auction rate securities classified as available-for-sale securities					110,000	131,000
Loss from change in valuation of available-for-sale securities recorded in accumulated other comprehensive loss	21,000
Amortized cost of Investment in mutual fund	9,802,000		10,282,000					1,000,000
Cash (paid) received on financial instruments, net	(193,000)	535,000
Impairment of investment in mutual fund								200,000
Proceeds from sale and maturity of mutual fund	4,470,000	881,000					800,000
Interest reset date period	90 days
Contractual maturity of ARS	10 years
Transfers of assets and liabilities between Level 1 and Level 2 of fair value measurement hierarchy	$ 0
Period at which investors can hold the investments at par or sell the securities at auction									35 days	7 days