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Principal Activities and Organization - Additional Information (Detail) | Dec. 31, 2008 Jincheng [Member] | Dec. 31, 2008 Xinshichuang [Member] | Dec. 31, 2008 Wanshuizhiyuan [Member] | Dec. 31, 2008 Shenyang Jingli [Member] | Dec. 31, 2008 Qingdao Kaixiang [Member] | Dec. 31, 2008 Haiya [Member] | Dec. 31, 2008 Shengshitongda [Member] | Dec. 31, 2008 Shanghai Botang [Member] | Dec. 31, 2011 HK Ad-Icon [Member] | Dec. 31, 2008 HK Ad-Icon [Member] | Dec. 31, 2008 Changsha Jingli [Member] | Dec. 31, 2008 Wenzhou Rigao [Member] | Dec. 31, 2008 Wuxi Ruizhong [Member] | Dec. 31, 2010 Zhejiang Continental [Member] | Nov. 30, 2012 Shanghai Tiger Shangda [Member]
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Organization And Principal Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interests | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% | 100.00%

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- Definition Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. + References No definition available. + Details
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