XML 90 R71.htm IDEA: XBRL DOCUMENT v3.8.0.1

Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2017
Property | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	25 years
Property | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	46 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	Over the shorter of lease term or the estimated useful lives of the assets
Optical Fibers | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	10 years
Optical Fibers | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	20 years
Computer and network equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	1 year
Computer and network equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	10 years
Office equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	1 year
Office equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	8 years
Motor vehicles | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	4 years
Motor vehicles | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful life	8 years

X

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223

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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

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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