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Note 14 - Related Party Transactions (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Selling, General and Administrative Expenses [Member]
Allocation of Overhead and Other Expenses from Parent	$ 0	$ 3,900,000

X

- Definition

Represents information about the allocation of overhead and other expenses from the Parent to the Company.

+ References

No definition available.

+ Details

Name:	cabo_AllocationOfOverheadAndOtherExpensesFromParent
Namespace Prefix:	cabo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: