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Debt - Additional Information (Detail) | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended
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Dec. 31, 2013 USD ($) | Dec. 31, 2013 EUR (€) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 EUR (€) | Dec. 31, 2013 Federal Funds Rate Minimum | Dec. 31, 2013 Federal Funds Rate Maximum | Dec. 31, 2013 US Bank of America credit facility Maximum | Dec. 31, 2013 W.E.T. Bank of America credit facility Minimum | Dec. 31, 2013 Eurocurrency Rate Loans | Dec. 31, 2013 Eurocurrency Rate Loans Minimum | Dec. 31, 2013 Eurocurrency Rate Loans Maximum | Dec. 31, 2013 Base Rate Loans | Dec. 31, 2013 German Investment Corporation USD ($) | Dec. 31, 2013 German Investment Corporation EUR (€) | Mar. 31, 2011 Europe Term Note USD ($) | Dec. 31, 2013 Europe Term Note | Dec. 31, 2012 Europe Term Note
Debt Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, description | The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EUIBOR) rate (“Eurocurrency Rate Loans”) (0.16% – 0.48% at December 31, 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 EUIBOR) rate (“Eurocurrency Rate Loans”) (0.16% – 0.48% at December 31, 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 |  |  |  |  | 0.07% | 0.50% | 3.25% | 1.00% | 2.25% | 0.16% | 0.48% | 1.25% |  |  |  | 2.49% | 1.80%
Line of credit available amount | $ 29,550,000 | € 20,000,000 | $ 29,550,000 | € 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letter of credit | 450,000 |  | 450,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  |  |  |  |  |  |  |  |  | 5,561,000 | 4,000,000 |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 4.25% | 4.25% |  |  |
Additional Borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 40,400,000 |  |

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- Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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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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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The effective interest rate during the reporting period. + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References No definition available. + Details
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