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Schedule of Reconciliation of Effective Tax Rate (Detail) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Tax Disclosure [Line Items] |  |  |
U.S. statutory federal tax rate | 35.00% | 35.00% | 35.00%
Foreign taxes | (10.80%) | (11.50%) | (12.60%)
U.S. research and development credit | (7.20%) |  | (1.10%)
Other U.S. permanent items | 1.10% | (2.80%) | 5.70%
Valuation allowance | 0.40% | (0.50%) | (86.60%)
State income taxes, net of federal tax benefit | 0.10% | (1.70%) |
Other, net | (0.30%) | (0.10%) | (0.80%)
Effective tax rate, Total | 18.30% | 18.40% | (60.40%)

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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