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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2012
Inventory [Abstract] |
Changes In the Inventory Reserves |
|  | Six Months Ended June 30, |  |  | Three Months Ended June 30, |
| 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
|  | (In Thousands) |
Balance at beginning of period |  | $ | 1,783 |  |  | $ | 1,793 |  |  | $ | 1,705 |  |  | $ | 1,775 |
Provisions for losses |  |  | 44 |  |  |  | 279 |  |  |  | 39 |  |  |  | 294 |
Write-offs and disposals |  |  | (90 | ) |  |  | (84 | ) |  |  | (7 | ) |  |  | (81 | )
Balance at end of period |  | $ | 1,737 |  |  | $ | 1,988 |  |  | $ | 1,737 |  |  | $ | 1,988 |

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- Details
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