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Business Segment Information - People's Republic of China Including Hong Kong Percentage Share of the Company's Total Revenue, Net Revenue, Total Identifiable Assets or Equity (Detail) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Total revenues | People's Republic of China, including Hong Kong |  |  |
Concentration Risk [Line Items] |  |  |
Concentration percentage | 33.00% | 34.00% | 34.00%
Net revenues | People's Republic of China, including Hong Kong |  |  |
Concentration Risk [Line Items] |  |  |
Concentration percentage | 16.00% | 16.00% | 18.00%
Identifiable assets at year end | People's Republic of China, including Hong Kong |  |  |
Concentration Risk [Line Items] |  |  |
Concentration percentage | 14.00% | 17.00% | 14.00%
Equity | People's Republic of China, including Hong Kong |  |  |
Concentration Risk [Line Items] |  |  |
Concentration percentage | 11.00% | 16.00% | 13.00%
Lower end | Geographic Concentration Risk |  |  |
Concentration Risk [Line Items] |  |  |
Concentration percentage | 10.00% | 10.00% | 10.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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