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Accounts Receivable, Net (Allowance for Doubtful Accounts) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥)
Accounts Receivable, Net [Abstract] |  |  |  |
Balance as of January 1 | ¥ 58,846 | $ 8,476 | ¥ 23,767 | ¥ 20,584
Additional provision charged to bad debt expenses | 47,762 | 6,879 | 46,990 | 9,229
Write-off of bad debt provision | (15,260) | (2,198) | (11,911) | (1,526)
Attributable to disposal of a subsidiary | 0 | 0 | 0 | (4,520)
Balance as of December 31 | ¥ 91,348 | $ 13,157 | ¥ 58,846 | ¥ 23,767

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- Definition Decrease of allowance for doubtful accounts from disposition of investment in subsidiary. + References No definition available. + Details
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