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Acquisitions (Tables) | 6 Months Ended
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Jun. 30, 2012
Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed | The allocation of the acquisition costs to the assets acquired and liabilities assumed, based on their estimated fair values, is as follows:
|  | ERC |  |  | PPC |  |  | Total |
Accounts receivable |  | $ | 5,766 |  |  | $ | 877 |  |  | $ | 6,643 |
Inventory |  |  | 4,217 |  |  |  | 932 |  |  |  | 5,149 |
Other current assets, net of cash acquired |  |  | 417 |  |  |  | 328 |  |  |  | 745 |
Property, plant and equipment |  |  | 2,738 |  |  |  | 1,985 |  |  |  | 4,723 |
Goodwill |  |  | 10,837 |  |  |  | 15,012 |  |  |  | 25,849 |
Intangible assets |  |  | 5,642 |  |  |  | 5,094 |  |  |  | 10,736 |
Other assets |  |  | 67 |  |  |  | 13 |  |  |  | 80 |
Total assets acquired |  |  | 29,684 |  |  |  | 24,241 |  |  |  | 53,925 |
Total liabilities assumed |  |  | (16,073 | ) |  |  | (3,651 | ) |  |  | (19,724 | )
Net assets acquired |  | $ | 13,611 |  |  | $ | 20,590 |  |  | $ | 34,201 |
Acquired Intangible Assets and Weighted Average Amortization Periods | The acquired intangible assets and weighted average amortization periods are as follows:
|  | Total |  |  | Weighted Average Life |
Trade names |  | $ | 1,017 |  |  |  | 15 |
Customer relationships |  |  | 7,585 |  |  |  | 6 |
Unpatented technology |  |  | 2,134 |  |  |  | 6 |
2012 acquired intangible assets |  | $ | 10,736 |  |  |  |  |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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