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Warranties (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Warranty accrual: |  |  |
Balance, beginning of period | $ 7,352us-gaap_StandardProductWarrantyAccrual | $ 5,776us-gaap_StandardProductWarrantyAccrual | $ 6,093us-gaap_StandardProductWarrantyAccrual
Payments made | (4,096)us-gaap_StandardProductWarrantyAccrualPayments | (4,448)us-gaap_StandardProductWarrantyAccrualPayments | (3,861)us-gaap_StandardProductWarrantyAccrualPayments
Provisions | 4,874us-gaap_StandardProductWarrantyAccrualWarrantiesIssued | 6,005us-gaap_StandardProductWarrantyAccrualWarrantiesIssued | 3,304us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Adjustments related to changes in estimates | 0us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease | 19us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease | 240us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease
Balance, end of period | 8,130us-gaap_StandardProductWarrantyAccrual | 7,352us-gaap_StandardProductWarrantyAccrual | 5,776us-gaap_StandardProductWarrantyAccrual
Warranty expense | $ 4,874us-gaap_ProductWarrantyExpense | $ 6,024us-gaap_ProductWarrantyExpense | $ 3,545us-gaap_ProductWarrantyExpense

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- Details
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- Definition The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3,4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended 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 -Subparagraph (c)(1),(c)(5) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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