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Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Capital Expenditures, Depreciation and Amortization Expense and Segment Assets by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 3,098 | $ 3,356 |
Depreciation and amortization | 4,150 | 4,092 |
Accounts receivable | 119,463 |  | 116,744
Inventory | 147,511 |  | 142,727
Total segment assets | 266,974 |  | 259,471
Advanced Manufacturing Capital Equipment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1,709 | 2,612 |
Depreciation and amortization | 2,911 | 2,941 |
Accounts receivable | 17,055 |  | 20,767
Inventory | 121,897 |  | 117,822
Total segment assets | 138,952 |  | 138,589
Analytical Solutions Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1,014 | 111 |
Depreciation and amortization | 214 | 243 |
Accounts receivable | 4,513 |  | 5,603
Inventory | 4,342 |  | 4,391
Total segment assets | 8,855 |  | 9,994
Europe Region Sales & Service Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 15 | 15 |
Depreciation and amortization | 90 | 74 |
Accounts receivable | 7,592 |  | 6,538
Inventory | 4,305 |  | 4,254
Total segment assets | 11,897 |  | 10,792
Asia Region Sales & Service Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 122 | 63 |
Depreciation and amortization | 289 | 294 |
Accounts receivable | 43,216 |  | 44,207
Inventory | 26,475 |  | 25,094
Total segment assets | 69,691 |  | 69,301
Corporate, Eliminations and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 238 | 555 |
Depreciation and amortization | 646 | 540 |
Accounts receivable | 47,087 |  | 39,629
Inventory | (9,508) |  | (8,834)
Total segment assets | $ 37,579 |  | $ 30,795

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + 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 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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