|
Investment In Equity Investees - Additional Information (Parenthetical) (Detail) (Yunfeng Fund)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
USD ($)
|
Sep. 30, 2011
USD ($)
|
Sep. 30, 2011
CNY
|
|
| Schedule of Equity Method Investments [Line Items] | |||
| Aggregate cost of investment | $ 50,374,172 | 317,050,000 | |
| Investment term | 10 years | ||
| Extension option period | 2 years | ||
| Purchased Ordinary Shares | $ 13.50 | ||