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Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Life (Details) | 12 Months Ended
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Dec. 31, 2017
Buildings and improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P40Y
Property, plant and equipment, useful life | 40 years
Buildings and improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P5Y
Property, plant and equipment, useful life | 5 years
Machinery, satellite hubs and equipment, and video-on-demand units | Maximum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P10Y
Property, plant and equipment, useful life | 10 years
Machinery, satellite hubs and equipment, and video-on-demand units | Minimum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P4Y
Property, plant and equipment, useful life | 4 years
Office and computer equipment | Maximum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P7Y
Property, plant and equipment, useful life | 7 years
Office and computer equipment | Minimum |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P3Y
Property, plant and equipment, useful life | 3 years
Motor vehicles |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Estimated Useful Lives | P5Y
Property, plant and equipment, useful life | 5 years

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- 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 + 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 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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