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Carrying Amounts of Property and Equipment Held Under Capital Leases (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
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Capital Leased Assets [Line Items] |  |  |
Property and Equipment Held Under Capital Leases, gross | $ 154,559 | ¥ 1,005,608 | ¥ 1,004,724
Less: Accumulated depreciation | (40,361) | (262,601) | (238,765)
Property and Equipment Held Under Capital Leases, gross | 114,198 | 743,007 | 765,959
Construction-in-progress | 84,509 | 549,845 | 1,043,881
Property and Equipment Held Under Capital Leases, net | 134,208 | 873,199 | 801,865
Property |  |  |
Capital Leased Assets [Line Items] |  |  |
Property and Equipment Held Under Capital Leases, gross | 56,154 | 365,353 | 365,353
Computer and network equipment |  |  |
Capital Leased Assets [Line Items] |  |  |
Property and Equipment Held Under Capital Leases, gross | 76,469 | 497,532 | 431,948
Optical Fibers |  |  |
Capital Leased Assets [Line Items] |  |  |
Property and Equipment Held Under Capital Leases, gross | 21,936 | 142,723 | 207,423
Capital Lease |  |  |
Capital Leased Assets [Line Items] |  |  |
Construction-in-progress | $ 20,010 | ¥ 130,192 | ¥ 35,906

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- Definition Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 + Details
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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Capital Leased Assets Net Excluding Construction In Progress + References No definition available. + Details
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