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Inventories | 12 Months Ended
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Dec. 31, 2015
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories are as follows (in thousands):
| December 31,
| 2015 |  | 2014
Raw materials | $ | 44,997 |  |  | $ | 50,195 |
Work-in-process | 3,069 |  |  | 3,129 |
Finished goods | 37,426 |  |  | 32,634 |
Inventories, net | $ | 85,492 |  |  | $ | 85,958 |
Changes in the reserve for excess and obsolete inventory are as follows (in thousands):
| Year ended December 31,
| 2015 |  | 2014 |  | 2013
Balance, beginning of year | $ | — |  |  | $ | 2,744 |  |  | $ | 2,752 |
Charged to costs and expenses | — |  |  | 358 |  |  | 1,330 |
Deductions | — |  |  | (3,102 | ) |  | (1,338 | )
Balance, end of the year | $ | — |  |  | $ | — |  |  | $ | 2,744 |
During the year ended December 31, 2015, the Company recorded an $18.6 million write-down of inventory to recognize the impairment from refocusing the Drilling Technologies and Production Technologies segments and for all items identified as excess and obsolete inventory. At December 31, 2014, the Company recorded a $2.0 million write-down of inventory to recognize impairment of all items identified and included in the reserve for excess and obsolete inventory.

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- Definition The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income. + 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a, b, c -Article 5 + Details
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