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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 720

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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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).

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Represents the percentage of revenue to be paid to local authority.

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Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014 item	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Summary of Significant Accounting Policies
Number of operating segments	1	1
Intangible Assets and Goodwill
Estimated life of franchise related customer relationships, based on subscriber base		4 years
Asset Impairments
Impairment of indefinite lived intangible assets		$ 0
Advertising costs
Advertising expense		$ 20,600,000	$ 15,100,000	$ 12,000,000
Maximum
Revenue Recognition
Percentage of revenue to be paid to local franchise authority		5.00%
Office and technical equipment \| Minimum
Estimated Useful Lives
Estimated useful lives		P3Y
Office and technical equipment \| Maximum
Estimated Useful Lives
Estimated useful lives		P10Y
Computer equipment and software
Estimated Useful Lives
Estimated useful lives		P3Y
Customer premise equipment
Estimated Useful Lives
Estimated useful lives		P5Y
Vehicles
Estimated Useful Lives
Estimated useful lives		P5Y
Headend equipment
Estimated Useful Lives
Estimated useful lives		P7Y
Distribution facilities
Estimated Useful Lives
Estimated useful lives		P10Y
Buildings and leasehold improvements \| Minimum
Estimated Useful Lives
Estimated useful lives		P5Y
Buildings and leasehold improvements \| Maximum
Estimated Useful Lives
Estimated useful lives		P20Y