| **Investment Income (Loss) (Details) (USD $)In Thousands** | 3 Months Ended | 9 Months Ended |
|------------------------------------------------------------|----------------|----------------|
||
| **Investment Income (Loss) [Abstract]**                    |           |           |   |   |
| Interest and dividend income                               | $ 87           | $ 289          | $ 2,971 | $ 2,822 |
| Investment gain                                            | 0              | 0              | 1,071 | 2,905 |
| Equity earnings (losses)                                   | (753)          | 108            | (1,418) | 667 |
| Total investment income (loss)                             | $ (666)        | $ 397          | $ 2,624 | $ 6,394 |

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| - Definition
This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.
+ References
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| - Definition
This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.
+ References
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| - Definition
Interest and dividend income on all securities.
+ References
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| - Definition
This item represents investment income derived from investments in debt and equity securities consisting of interest income earned from investments in debt securities and on cash and cash equivalents, dividend income from investments in equity securities, and income or expense derived from the amortization of investment related discounts or premiums, respectively, net of related investment expenses. This item does not include realized or unrealized gains or losses on the sale or holding of investments in debt and equity securities required to be included in earnings for the period or for other than temporary losses related to investments in debt and equity securities which are included in realized losses in the period recognized, and does not include investment income from real or personal property, such as rental income.
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