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Commitment and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015
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Commitments and Contingencies Disclosure [Abstract] |
Outstanding letters of credit and surety bonds | $ 113.2 out_LettersofCreditandSuretyBondsAmountOutstanding

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- Definition Letters of Credit and Surety Bonds, Amount Outstanding + References No definition available. + Details
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Namespace Prefix: | out_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration