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Warranties (Tables) | 12 Months Ended
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Dec. 31, 2014
Guarantees [Abstract] |
Warranty | Changes in the warranty accrual are as follows:
| Years Ending December 31,
| 2014 |  | 2013 |  | 2012
Warranty accrual: | (in thousands)
Balance, beginning of period | $ | 7,352 |  |  | $ | 5,776 |  |  | $ | 6,093 |
Payments made | (4,096 | ) |  | (4,448 | ) |  | (3,861 | )
Provisions | 4,874 |  |  | 6,005 |  |  | 3,304 |
Adjustments related to changes in estimates | — |  |  | 19 |  |  | 240 |
Balance, end of period | $ | 8,130 |  |  | $ | 7,352 |  |  | $ | 5,776 |
Warranty expense: | $ | 4,874 |  |  | $ | 6,024 |  |  | $ | 3,545 |

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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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