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Marketable Securities Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities Reconciliation | The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security at December 31, 2013 were as follows:
(In thousands) | Amortized cost |  | Gross unrealized holding gains |  | Gross unrealized holding losses |  | Estimated fair value
December 31, 2013 |  |  |  |  |  |  |
| Available-for-sale securities: |  |  |  |  |  |  |
|  | Corporate bonds and notes | $ | 18,832 |  |  | $ | 68 |  |  | $ | (43 | ) |  | $ | 18,857 |
|  | Municipal bonds | 6,658 |  |  | 22 |  |  | (11 | ) |  | 6,669 |
| Total available-for-sale securities | $ | 25,490 |  |  | $ | 90 |  |  | $ | (54 | ) |  | $ | 25,526 |
Marketable Securities | Maturities of marketable securities classified as available-for-sale securities were as follows at December 31, 2013:
(In thousands) | Amortized cost |  | Estimated fair value
| Due within one year | $ | 3,198 |  |  | $ | 3,200 |
| Due after one year through five years | 20,711 |  |  | 20,737 |
| Due after five years through ten years | 1,581 |  |  | 1,589 |
Total available-for-sale securities | $ | 25,490 |  |  | $ | 25,526 |
Available-for-sale Marketable Securities | The available-for-sale marketable securities in a gross unrealized loss position as of December 31, 2013 are summarized as follows:
| Less than 12 months |  | More than 12 months |  | Total
(In thousands) | Estimated fair value |  | Gross unrealized holding losses |  | Estimated fair value |  | Gross unrealized holding losses |  | Estimated fair value |  | Gross unrealized holding losses
As of December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Corporate bonds and notes | $ | 204 |  |  | $ | (1 | ) |  | $ | 6,687 |  |  | $ | (42 | ) |  | $ | 6,891 |  |  | $ | (43 | )
Municipal bonds | 355 |  |  | (1 | ) |  | 1,125 |  |  | (10 | ) |  | 1,480 |  |  | (11 | )
| $ | 559 |  |  | $ | (2 | ) |  | $ | 7,812 |  |  | $ | (52 | ) |  | $ | 8,371 |  |  | $ | (54 | )

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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