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Warranties | 6 Months Ended
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Jun. 30, 2017
Guarantees [Abstract] |
Warranties | Warranties The Company has warranties with various terms ranging from 18 months for parts to 25 years for certain heat exchangers. The Company has an obligation to replace parts or service its products if conditions under the warranty are met. A provision is made for estimated warranty costs at the time the related products are sold based upon the warranty period, historical trends, new products and any known identifiable warranty issues. The Company has been working on modifications and refinements to its warranty policy. These modifications more clearly define what qualifies as a warranty claim and puts a deadline for when claims may be submitted. This has increased our warranty reserve and increased our warranty expense for the three and six months ended June 30, 2017, as detailed below. Changes in the warranty accrual are as follows:
| Three months ended |  | Six months ended
| June 30, 2017 |  | June 30, 2016 |  | June 30, 2017 |  | June 30, 2016
Warranty accrual: | (in thousands)
Balance, beginning of period | $ | 7,812 |  |  | $ | 8,130 |  |  | $ | 7,936 |  |  | $ | 8,469 |
Payments made | (2,312 | ) |  | (1,004 | ) |  | (3,654 | ) |  | (1,657 | )
Provisions | 3,102 |  |  | 1,328 |  |  | 4,320 |  |  | 1,642 |
Balance, end of period | $ | 8,602 |  |  | $ | 8,454 |  |  | $ | 8,602 |  |  | $ | 8,454 |
Warranty expense: | $ | 3,102 |  |  | $ | 1,328 |  |  | $ | 4,320 |  |  | $ | 1,642 |

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + 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=68068213&loc=d3e12565-110249 + Details
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