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Discontinued Operations Gain on Sale of Subsidiary (Details) $ in Thousands | Sep. 30, 2015 USD ($)
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Installment payment received for sale of subsidiary | $ 117,384

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- Definition Installment payment received for sale of subsidiary + References No definition available. + Details
Name: | cci_Installmentpaymentreceivedforsaleofsubsidiary
Namespace Prefix: | cci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration