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Debt - Additional Information (Detail) In Thousands, unless otherwise specified | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 USD ($) | Sep. 30, 2013 EUR (€) | Feb. 28, 2013 Europe Term Note USD ($) | Sep. 30, 2013 W.E.T. Bank of America credit facility | Sep. 30, 2013 W.E.T. Bank of America credit facility Minimum | Sep. 30, 2013 Eurocurrency Rate Loans | Sep. 30, 2013 Eurocurrency Rate Loans Minimum | Sep. 30, 2013 Eurocurrency Rate Loans Maximum | Sep. 30, 2013 Federal Funds Rate Minimum | Sep. 30, 2013 Federal Funds Rate Maximum | Sep. 30, 2013 US Bank of America credit facility Maximum | Sep. 30, 2013 Base Rate Loans | Sep. 30, 2012 Bank of China USD ($) | Sep. 30, 2012 Bank of China CNY | Sep. 30, 2013 German Investment Corporation USD ($) | Sep. 30, 2013 German Investment Corporation EUR (€) | Sep. 30, 2013 German Investment Corporation Euro Swap Rate
Debt Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amortization of credit facility percentage year one | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amortization of credit facility percentage year two | 12.50% | 12.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amortization of credit facility percentage year three | 15.00% | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amortization of credit facility percentage year four | 17.50% | 17.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amortization of credit facility percentage year five | 10.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly principal payments |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility due date | Mar. 30, 2016 | Mar. 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description | The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EURIBOR) rate (“Eurocurrency Rate Loans”) (0.17% – 0.45% at September 30, 2013) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”), which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements. | The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EURIBOR) rate (“Eurocurrency Rate Loans”) (0.17% – 0.45% at September 30, 2013) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”), which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 1.00% | 2.25% | 0.20% | 0.40% | 0.06% | 0.50% | 3.25% | 1.25% |  |  | 4.25% | 4.25% | 3.00%
Amount of draw on europe term note |  |  | $ 40,441 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  |  |  |  |  |  |  |  |  | 3,159 | 20,000 |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 6.90% | 6.90% |  |  |
Initial amount drawn from German Investment Corporation |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,601 | 2,000 |
Line of credit facility | 29,550 | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  | 2,701 | 2,000 |
Spread variable interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25%
Outstanding letter of credit | $ 450 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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