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Summary of Company's debt (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Debt Instrument [Line Items] |  |
Total debt | $ 82,320 | $ 56,952
Current portion | (21,439) | (17,218)
Long-term debt, less current maturities | 60,881 | 39,734
US Term Note |  |
Debt Instrument [Line Items] |  |
Total debt | 24,500 | 29,312
Interest Rate | 2.50% | 2.06%
Europe Term Note |  |
Debt Instrument [Line Items] |  |
Total debt | 38,899 | 4,476
Interest Rate | 2.49% | 1.80%
W.E.T. Term Note |  |
Debt Instrument [Line Items] |  |
Total debt | 10,920 | 18,852
Interest Rate | 2.01% | 2.00%
DEG Loan |  |
Debt Instrument [Line Items] |  |
Total debt | 5,561 | 3,172
Interest Rate | 4.25% | 6.90%
Capital Leases |  |
Debt Instrument [Line Items] |  |
Total debt | $ 2,440 | $ 1,140
Interest Rate | 4.20% | 5.50%

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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