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Loans Payable - Additional Information (Detail) ¥ in Thousands, AUD in Thousands, $ in Thousands |  |  |  |  |  |  |  |  | 1 Months Ended | 2 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 18, 2015 USD ($) | Dec. 18, 2015 CNY (¥) | Aug. 28, 2015 USD ($) | Aug. 10, 2015 USD ($) | May. 21, 2015 USD ($) | May. 21, 2015 CNY (¥) | Dec. 09, 2014 USD ($) Derivative Loan Agreement | May. 13, 2014 USD ($) | Aug. 19, 2013 USD ($) | Jul. 29, 2013 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 CNY (¥) | Sep. 30, 2015 CNY (¥) | Sep. 22, 2015 USD ($) | Sep. 22, 2015 CNY (¥) | Aug. 28, 2015 CNY (¥) | Aug. 25, 2015 USD ($) | Aug. 25, 2015 CNY (¥) | Aug. 10, 2015 CNY (¥) | Jul. 17, 2015 USD ($) | Jul. 17, 2015 CNY (¥) | Dec. 09, 2014 CNY (¥) Derivative Loan Agreement | Sep. 25, 2014 USD ($) | Sep. 25, 2014 CNY (¥) | May. 23, 2014 USD ($) | May. 23, 2014 CNY (¥) | May. 13, 2014 CNY (¥) | Aug. 19, 2013 AUD | Aug. 19, 2013 CNY (¥) | Aug. 13, 2013 AUD | Aug. 13, 2013 CNY (¥) | Jul. 29, 2013 CNY (¥) | Jul. 24, 2013 USD ($) | Jul. 24, 2013 CNY (¥)
China Merchant Bank (Shanghai Branch) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Specific amount up to which borrowings can be made under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,440 | ¥ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  | $ 1,530 | $ 13,900 | ¥ 90,100 | ¥ 9,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual interest rate |  |  |  |  |  |  |  |  |  |  | 4.60% | 4.35% | 4.35% | 4.60% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank loan maturity period |  |  |  |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HSBC Bank Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Specific amount up to which borrowings can be made under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 | ¥ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under the commitment of a bank loan |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.42% | 1.42% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank loan maturity period |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HSBC Bank Loan | Loans Borrowed by 91 Wireless |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Specific amount up to which borrowings can be made under the commitment of a bank loan |  |  |  |  |  |  |  | $ 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 129,560 |  |  |  |  |  |  |
The percentage points added to LIBOR to compute the floating interest rate per annum |  |  |  |  |  |  |  | 0.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,000 | ¥ 51,820 | $ 7,000 | ¥ 45,340 |  |  |  |  |  |  |  |
Annual interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.13% | 1.13% | 1.12% | 1.12% |  |  |  |  |  |  |  |
Repayment of loan due | $ 8,000 | ¥ 51,820 |  |  | $ 7,000 | ¥ 45,340 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sumitomo Mitsui Bank Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Specific amount up to which borrowings can be made under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 150,000 | ¥ 971,670 |  |  |  |  |  |  |  |  |  |  |  | $ 150,000 | ¥ 971,670
Amount borrowed under the commitment of a bank loan |  |  |  | $ 150,000 |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  | ¥ 971,670 |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 971,670 |  |
Annual interest rate |  |  |  | 1.41% |  |  |  |  |  | 1.17% |  |  |  |  |  |  |  |  |  | 1.41% |  |  |  |  |  |  |  |  |  |  |  |  | 1.17% |  |
Bank loan maturity period |  |  |  | 2 years |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ANZ Bank Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Specific amount up to which borrowings can be made under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 235,000 | ¥ 1,300,000 |  |  |
Amount borrowed under the commitment of a bank loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | AUD 235,000 | ¥ 1,300,000 |  |  |  |  |
Annual interest rate |  |  |  |  |  |  |  |  | 1.65% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.65% | 1.65% |  |  |  |  |
Bank loan maturity period |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured loan borrowed | $ |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank of China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of loan agreements | Agreement |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Number of unsecured loan | Loan |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Number of interest rate swap agreements | Derivative |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Bank of China | Unsecured Loan 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under the commitment of a bank loan |  |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 971,670 |  |  |  |  |  |  |  |  |  |  |  |
Annual interest rate |  |  |  |  |  |  | 2.31% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.31% |  |  |  |  |  |  |  |  |  |  |  |
Bank loan maturity period |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank of China | Unsecured Loan 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount borrowed under the commitment of a bank loan |  |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 971,670 |  |  |  |  |  |  |  |  |  |  |  |
Annual interest rate |  |  |  |  |  |  | 2.45% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.45% |  |  |  |  |  |  |  |  |  |  |  |
Bank loan maturity period |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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