Name:	cabo_DebtInstrumentAmortizationPercentOnAQuarterlyBasis
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage of the prepayment penalty of the debt instrument if prepaid within six months of funding.

No definition available.

Name:	cabo_DebtInstrumentPrepaymentPenaltyPrepaidWithinSixMonthsPercent
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the long term debt amortization rate, as a percentage, for the first twelve months.

No definition available.

Name:	cabo_LongTermDebtAmortizationRateFirstTwelveMonths
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the debt amortization, as a percentage, in year five.

No definition available.

Name:	cabo_LongTermDebtAmortizationRateYearFive
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the amortization rate, as a percentage, for year four.

No definition available.

Name:	cabo_LongTermDebtAmortizationRateYearFour
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the debt amortization rate, as a percentage, for year three.

No definition available.

Name:	cabo_LongTermDebtAmortizationRateYearThree
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the long term debt amortization rate, as a percentage, for year two.

No definition available.

Name:	cabo_LongTermDebtAmortizationRateYearTwo
Namespace Prefix:	cabo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
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Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=cabo_IncrementalTermLoanAMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=cabo_IncrementalTermLoanBMember
Namespace Prefix:
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