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Changes In Carrying Amount of Goodwill (Detail)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Indefinite-lived Intangible Assets [Line Items]      
Balance as of January 1 $ 388,363 2,419,542 63,686
Goodwill acquired 234,029 1,458,023 2,468,874
Impairment losses 0 0 (113,011)
Foreign currency translation adjustment 0 (1) (7)
Balance as of December 31 $ 622,392 3,877,564 2,419,542