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Acquisition Consideration Payable - Summary of Contingent Consideration (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | $ 116,761 | $ 115,676
Consideration paid in cash | 88,834 | 87,763
Consideration paid in stock | 6,364 | 6,364
Extinguishment of consideration | 3,131 | 3,032
Consideration extinguished on disposal | 17,968 | 17,968
consideration payable | 464 | 549
Payable in cash |  | 99
Payable in stock | 464 | 450
Qingdao Kaixiang [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 16,070 | 16,070
Consideration paid in cash | 7,748 | 7,748
Consideration paid in stock | 4,196 | 4,196
Extinguishment of consideration |  |
Consideration extinguished on disposal | 4,126 | 4,126
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Wanshuizhiyuan [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 11,121 | 11,121
Consideration paid in cash | 9,915 | 9,915
Consideration paid in stock |  |
Extinguishment of consideration |  |
Consideration extinguished on disposal | 1,206 | 1,206
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Shenyang Jingli [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 18,092 | 18,092
Consideration paid in cash | 16,655 | 16,655
Consideration paid in stock |  |
Extinguishment of consideration |  |
Consideration extinguished on disposal | 1,437 | 1,437
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Haiya [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 9,002 | 9,002
Consideration paid in cash | 5,970 | 5,970
Consideration paid in stock |  |
Extinguishment of consideration | 3,032 | 3,032
Consideration extinguished on disposal |  |
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Shanghai Botang [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 36,176 | 35,091
Consideration paid in cash | 35,712 | 34,641
Consideration paid in stock |  |
Extinguishment of consideration |  |
Consideration extinguished on disposal |  |
consideration payable | 464 | 450
Payable in cash |  |
Payable in stock | 464 | 450
HK Ad-Icon [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 2,414 | 2,414
Consideration paid in cash | 1,847 | 1,847
Consideration paid in stock | 468 | 468
Extinguishment of consideration | 99 |
Consideration extinguished on disposal |  |
consideration payable |  | 99
Payable in cash |  | 99
Payable in stock |  |
Wenzhou Rigao [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 8,380 | 8,380
Consideration paid in cash | 4,770 | 4,770
Consideration paid in stock |  |
Extinguishment of consideration |  |
Consideration extinguished on disposal | 3,610 | 3,610
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Wuxi Ruizhong [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 4,783 | 4,783
Consideration paid in cash | 3,744 | 3,744
Consideration paid in stock |  |
Extinguishment of consideration |  |
Consideration extinguished on disposal | 1,039 | 1,039
consideration payable |  |
Payable in cash |  |
Payable in stock |  |
Zhejiang Continental [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration | 10,723 | 10,723
Consideration paid in cash | 2,473 | 2,473
Consideration paid in stock | 1,700 | 1,700
Extinguishment of consideration |  |
Consideration extinguished on disposal | 6,550 | 6,550
consideration payable |  |
Payable in cash |  |
Payable in stock |  |

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