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Represents the speed per second of bandwidth.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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-Name Regulation S-X (SX)

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-Section 02

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Description of the business and recent developments: (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 MB	Aug. 19, 2013	Jan. 26, 2011
Financial instruments
Letters of credit, outstanding amount	300,000
Senior Notes, Noncurrent	250,000,000us-gaap_SeniorLongTermNotes
Minimum
On-net service - high-speed Internet access and IP connectivity
Speed per second of bandwidth (in megabits)	100
Maximum
On-net service - high-speed Internet access and IP connectivity
Speed per second of bandwidth (in megabits)	10,240
Senior unsecured notes
Financial instruments
Aggregate principal amount of debt issued	200,000,000
Senior unsecured notes \| Level 2
Financial instruments
Debt instrument, amount	196,000,000
Senior secured notes
Financial instruments
Aggregate principal amount of debt issued		65,000,000	175,000,000
Senior Notes, Noncurrent	250,000,000
Senior secured notes \| Level 2
Financial instruments
Debt instrument, amount	248,800,000