Investments carried at fair value	3 Months Ended
Investments carried at fair value	Mar. 31, 2012
Investments carried at fair value [Abstract]
Investments carried at fair value	5. Investments Carried at Fair Value Investments include $2.0 million and $2.2 million of investments carried at fair value as of March 31, 2012 and December 31, 2011, respectively, consisting of equity, bond and money market mutual funds. These investments were acquired under a rabbi trust arrangement related to a non-qualified supplemental retirement plan maintained by the Company. During the three months ended March 31, 2012, the Company recognized $48 thousand in net gains on dispositions of investments, recognized $18 thousand in dividend and interest income from investments, and recognized net unrealized gains of $161 thousand on these investments. The Company also received $402 thousand distributed from the rabbi trust in connection with a payout from the non-qualified supplemental retirement plan to a participant. Fair values for these investments held under the rabbi trust were determined by Level 1 quoted market prices for the underlying mutual funds.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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