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Accrued Warranty Costs (Tables) | 6 Months Ended
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Jun. 30, 2014
Guarantees [Abstract] |
Changes in Product Warranty Obligation (Accrued Warranty Costs) | Changes in our product warranty obligation (accrued warranty costs) are as follows:
|  | Six Months Ended |  |  | Three Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2014 |  |  | 2013 |  |  | 2014 |  |  | 2013 |
|  | (In Thousands) |
Balance at beginning of period |  | $ | 7,297 |  |  | $ | 6,172 |  |  | $ | 7,578 |  |  | $ | 6,486 |
Amounts charged to costs and expenses |  |  | 3,695 |  |  |  | 4,011 |  |  |  | 1,468 |  |  |  | 2,021 |
Costs incurred |  |  | (3,291 | ) |  |  | (3,239 | ) |  |  | (1,345 | ) |  |  | (1,563 | )
Balance at end of period |  | $ | 7,701 |  |  | $ | 6,944 |  |  | $ | 7,701 |  |  | $ | 6,944 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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