Fair Value (Assets measured at fair value on recurring basis) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	$ 1,160	$ 1,281
Government Sponsored Enterprises residential mortgage-backed securities [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	1,031	1,152
Investments in money market funds [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	129	129
Fair Value on a Recurring Basis [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	129	129
Fair Value on a Recurring Basis [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Government Sponsored Enterprises residential mortgage-backed securities [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value
Fair Value on a Recurring Basis [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Investments in money market funds [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	129	129
Fair Value on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	1,031	1,152
Fair Value on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Government Sponsored Enterprises residential mortgage-backed securities [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value	1,031	1,152
Fair Value on a Recurring Basis [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Investments in money market funds [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value
Fair Value on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value
Fair Value on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Government Sponsored Enterprises residential mortgage-backed securities [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value
Fair Value on a Recurring Basis [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Investments in money market funds [Member]
Assets on the consolidated balance sheets measured at fair value on a recurring basis
Available-for-sale Securities, Fair value

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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