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Segment Information - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Segment Reporting Information [Line Items] |  |  |  |
Number of geographic regions considered as reportable operating segments |  |  | 3 |
Customer Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of revenues | No single customer accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No single customer accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No single customer accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No single customer accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012.
Geographic Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of revenues | No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012. | No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and six months ended June 30, 2013 and 2012.

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Disclosure of the extent of enterprise reliance on its major customers. For example, includes revenues from transactions with a single external customer amounting to 10 percent or more of the entity's revenues, the total amount of revenues from each such customer, and the identity of the segment or segments reporting the revenues. A group of entities that the entity knows to be under common control generally will be considered a single customer for inclusion in this item. The federal government, a state government, a local government (for example, a county or municipality), or a foreign government each will generally be considered as a single customer for inclusion in this item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599 + Details
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