XML 142 R74.htm IDEA: XBRL DOCUMENT v2.4.0.8
22. Segment information (Details 2)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Supplier A
      
Supplier accounting for more than 5% of Group's purchases 17% 10% 7%
Supplier B
      
Supplier accounting for more than 5% of Group's purchases 11% 10% 13%
Supplier C
      
Supplier accounting for more than 5% of Group's purchases 10% 7% 21%
Supplier D
      
Supplier accounting for more than 5% of Group's purchases 7% 8% 6%
Supplier E
      
Supplier accounting for more than 5% of Group's purchases 6% 6% 4%
Supplier F
      
Supplier accounting for more than 5% of Group's purchases 6% 15% 7%