XML 35 R23.htm IDEA: XBRL DOCUMENT v2.4.1.9
Description of Business - Additional Information (Details) (Stock Distribution, Subsequent Event, Consumer CLEC Business, Windstream)
 0 Months Ended
Apr. 24, 2015
Stock Distribution | Subsequent Event | Consumer CLEC Business | Windstream
  
Related Party Transaction [Line Items]  
Percentage of stock distributed 80.40%csal_DistributionMadeToLimitedLiabilityCompanyMemberPercentageDistribution
/ us-gaap_DistributionsMadeToMemberOrLimitedPartnerByDistributionTypeAxis
= us-gaap_StockDistributionMember
/ dei_LegalEntityAxis
= csal_ConsumerCLECBusinessMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= csal_WindstreamMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember