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INVESTMENTS (Details 4) $ / shares in Units, ¥ in Thousands, $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2014 shares | Aug. 31, 2014 USD ($) | Aug. 31, 2014 CNY (¥) | May. 31, 2014 USD ($) $ / shares shares | May. 31, 2014 CNY (¥) shares | Dec. 31, 2013 USD ($) | Jun. 30, 2013 USD ($) | Nov. 30, 2010 USD ($) | Sep. 30, 2015 USD ($) item $ / shares | Sep. 30, 2015 CNY (¥) | Dec. 31, 2014 USD ($) item | Dec. 31, 2014 CNY (¥) | Sep. 30, 2015 CNY (¥) item
eHi |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition |  |  |  |  |  |  |  |  | $ 113.0 | ¥ 717,000 |  |  |
Voting power interest held (as a percent) |  |  |  |  |  |  |  |  | 19.90% |  |  |  | 19.90%
Purchase of Shares Percentage of Equity Interest Purchased Aggregate |  |  |  |  |  |  |  |  | 14.00% |  |  |  | 14.00%
Number Of Seats Allocated | item |  |  |  |  |  |  |  |  | 1 |  |  |  | 1
Number Of Board Of Directors Seats | item |  |  |  |  |  |  |  |  | 7 |  |  |  | 7
Increase/Decrease in fair value of the investment credited to other comprehensive income | ¥ |  |  |  |  |  |  |  |  |  | 37,000 |  |  |
eHi | ADS |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Closing stock price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 11.59 |  |  |  |
eHi | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  |  |  |  |  | $ 107.0 |  |  |  |  |  |  |
Purchase of Shares, Shares Purchased | shares | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Easy Go |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition |  |  |  |  |  |  |  |  | $ 101.0 | 643,000 |  |  |
Increase/Decrease in fair value of the investment credited to other comprehensive income | ¥ |  |  |  |  |  |  |  |  |  | 298,000 |  |  |
Easy Go | Series B Preferred Shares |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  |  |  |  |  | $ 53.0 |  |  |  |  |  |  |
Easy Go | Series C Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  | $ 53.0 |  |  |  |  |  |  |  |  |  |  |
Tuniu |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition |  |  |  | $ 15.0 | ¥ 93,000 |  |  |  |  |  |  |  |
Purchase of Shares Percentage of Equity Interest Purchased Aggregate |  |  |  |  |  |  |  |  |  |  | 4.60% |  |
Number Of Seats Allocated | item |  |  |  |  |  |  |  |  |  |  | 1 |  |
Number Of Board Of Directors Seats | item |  |  |  |  |  |  |  |  |  |  | 9 |  |
Fair value of available-for-sale investment |  |  |  |  |  |  |  |  | $ 49.0 |  | $ 49.0 |  | ¥ 314,000
Increase/Decrease in fair value of the investment credited to other comprehensive income | ¥ |  |  |  |  |  |  |  |  |  | ¥ 4,000 |  |  |
Tuniu | IPO |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of Shares, Shares Purchased | shares |  |  |  | 5,000,000 | 5,000,000 |  |  |  |  |  |  |  |
Tuniu | ADS |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of Shares, Shares Purchased | shares |  |  |  | 1,666,667 | 1,666,667 |  |  |  |  |  |  |  |
Closing stock price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 11.87 |  |  |  |
Tuniu | ADS | IPO |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of Shares Price Per Share | $ / shares |  |  |  | $ 9 |  |  |  |  |  |  |  |  |
Tuniu | Ordinary shares | IPO |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of Shares Price Per Share | $ / shares |  |  |  | $ 3 |  |  |  |  |  |  |  |  |
Dining Secretary |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  |  |  |  |  |  |  | $ 10.0 |  |  |  |  |
Loss from impairment of long-term investment (Note 9) | ¥ |  |  |  |  |  |  |  |  |  |  |  | ¥ 33,000 |
Unrealized loss in other comprehensive income | ¥ |  |  |  |  |  |  |  |  |  |  |  | 4,000 |
Happy City |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  |  |  |  |  |  | $ 6.0 |  |  |  |  |  |
Increase/Decrease in fair value of the investment credited to other comprehensive income |  |  |  |  |  |  |  |  |  |  | $ 0.3 | ¥ 2,000 |
Travel agency focusing on teenager market | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | ¥ |  |  | ¥ 81,000 |  |  |  |  |  |  |  |  |  |
Big-data service company |  |  |  |  |  |  |  |  |  |  |  |  |
Investment |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration of acquisition | $ |  | $ 10.0 |  |  |  |  |  |  |  |  |  |  |

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