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WARRANTIES | 3 Months Ended
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Mar. 31, 2021
WARRANTIES |
WARRANTIES | NOTE 14. WARRANTIES Provisions of our sales agreements include customary product warranties, generally ranging from 12 months to 24 months after shipment. The estimated cost of our warranty obligation is recorded when revenue is recognized and is based upon our historical experience by product and configuration. Our estimated warranty obligation is included in Other accrued expenses in our Unaudited Consolidated Balance Sheets. Changes in our product warranty obligation were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
​ |  | 2021 |  | 2020
Balances at beginning of period | ​ | $ | 4,780 | ​ | $ | 6,413
Increases to accruals | ​ |  | 780 | ​ |  | 758
Warranty expenditures | ​ |  | (1,051) | ​ |  | (856)
Effect of changes in exchange rates | ​ |  | (5) | ​ |  | —
Balances at end of period | ​ | $ | 4,504 | ​ | $ | 6,315
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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