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Discontinued operations - Schedule of Cumulative Gain on Disposal Activity (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Add/Less: Net book value of liability in connection with the disposal/divestiture |  | $ 61,856
Less: Goodwill writeoff |  | (16,926)
Gain/(loss) on disposal of discontinued components | 16,153 |
Zhejiang Continental [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total consideration on disposal | (1,700) |
Add/Less: Extinguishment of current accounts | 80 |
Add: Earn-out consideration payable settled | 8,250 |
Add/Less: Net book value of assets in connection with the disposal/divestiture | (1,170) |
Gain/(loss) on disposal of discontinued components | 5,460 |
Shenyang Jingli [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total consideration on disposal |  |
Add/Less: Extinguishment of current accounts | 1,586 |
Add: Extinguishment of acquisition consideration payable | 1,437 |
Add/Less: Net book value of liability in connection with the disposal/divestiture | 1,641 |
Gain/(loss) on disposal of discontinued components | 4,664 |
Qingdao Kaixiang [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total consideration on disposal |  |
Add/Less: Extinguishment of current accounts | 1,891 |
Add: Extinguishment of acquisition consideration payable | 4,126 |
Add/Less: Net book value of assets in connection with the disposal/divestiture | (4,574) |
Less: Goodwill writeoff | (3,261) |
Gain/(loss) on disposal of discontinued components | (1,818) |
Wuxi Ruizhong [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total consideration on disposal | 147 |
Add: Obligation exempted | 328 |
Add/Less: Extinguishment of current accounts | 1,414 |
Add: Extinguishment of acquisition consideration payable | 322 |
Add/Less: Net book value of assets in connection with the disposal/divestiture | (1,750) |
Less: Goodwill writeoff | (3,103) |
Gain/(loss) on disposal of discontinued components | (2,642) |
Search Media International [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Total consideration on disposal | (421) |
Add/Less: Extinguishment of current accounts | (107,243) |
Add/Less: Net book value of liability in connection with the disposal/divestiture | 118,153 |
Gain/(loss) on disposal of discontinued components | $ 10,489 |

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- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition For the disposal group, including a component of the entity (discontinued operation), carrying amount of goodwill (adjusted for any amortization recognized prior to adoption of FAS 142 and impairment charges). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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