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Inventories | 12 Months Ended
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Dec. 31, 2016
Inventory Disclosure [Abstract] |
Inventories | Inventories The Company's significant components of inventory at December 31, 2016 and 2015 were as follows (in thousands):
| December 31, 2016 |  | December 31, 2015
Raw materials and parts | $ | 106,329 |  |  | $ | 148,372 |
Work in process | 23,303 |  |  | 38,381 |
Finished goods | 277,303 |  |  | 315,256 |
Gross inventories | 406,935 |  |  | 502,009 |
Inventory reserve | (68,352 | ) |  | (77,888 | )
Inventories | $ | 338,583 |  |  | $ | 424,121 |
The change in the amounts of the inventory reserve during the three year period ended December 31, 2016 is as follows (in thousands):
Period ended |  | Balance at beginning of period |  | Charged to expense |  | Deductions or other |  | Balance at end of period
December 31, 2014 |  | $ | 26,419 |  |  | $ | 8,171 |  |  | $ | (5,134 | ) |  | $ | 29,456 |
December 31, 2015 |  | 29,456 |  |  | 51,917 |  |  | (3,485 | ) |  | $ | 77,888 |
December 31, 2016 |  | 77,888 |  |  | 25,537 |  |  | (35,073 | ) |  | $ | 68,352 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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