Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 22,664	$ 22,579
Gross Unrealized Gains	11,034	9,585
Gross Unrealized Losses	(1,565)	(1,551)
Fair Value	32,133	30,613
Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	4,207	4,207
Gross Unrealized Gains	10,918	9,480
Gross Unrealized Losses	(5)	(5)
Fair Value	15,120	13,682
Mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	943	928
Gross Unrealized Gains	59	23
Gross Unrealized Losses	0	0
Fair Value	1,002	951
Mortgage/asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	1,814	1,717
Gross Unrealized Gains	7	10
Gross Unrealized Losses	(12)	(4)
Fair Value	1,809	1,723
Government and government sponsored entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	14,984	15,058
Gross Unrealized Gains	22	45
Gross Unrealized Losses	(1,548)	(1,542)
Fair Value	13,458	13,561
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	683	636
Gross Unrealized Gains	27	26
Gross Unrealized Losses	0	0
Fair Value	710	662
International bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	33	33
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	0
Fair Value	$ 34	$ 34

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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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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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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