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Product warranties (Tables) | 9 Months Ended
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Sep. 27, 2014
Product Warranties Disclosures [Abstract] |
Provision for warranty obligations | The activity related to warranty obligations is as follows:
| Three Months Ended |  | Nine Months Ended
| September 27, 2014 |  | September 28, 2013 |  | September 27, 2014 |  | September 28, 2013
Balance at beginning of period | $ | 32,236 |  |  | 33,674 |  |  | 35,818 |  |  | 32,930 |
Warranty claims paid during the period | (11,720 | ) |  | (12,144 | ) |  | (41,606 | ) |  | (41,751 | )
Acquisitions | — |  |  | 48 |  |  | — |  |  | 3,331 |
Warranty expense during the period | 10,487 |  |  | 11,989 |  |  | 36,791 |  |  | 39,057 |
Balance at end of period | $ | 31,003 |  |  | 33,567 |  |  | 31,003 |  |  | 33,567 |

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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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