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Investment in Unconsolidated Joint Ventures (Temco Associates, LLC) (Details) (Temco Associates, USD $)
Dec. 31, 2014
Venture
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures (ventures) 2cuz_NumberOfJointVentures
Cash balance of joint venture $ 196,000cuz_EquityMethodInvestmentsSummarizedFinancialInformationCash
Forestar [Member]  
Schedule of Equity Method Investments [Line Items]  
Ownership Percentage of Partner in Joint Venture 50.00%cuz_OwnershipPercentageOfPartnerInJointVenture
/ us-gaap_LeaseArrangementTypeAxis
= cuz_ForestarMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_TemcoAssociatesLlcMember
Residential Real Estate [Member]  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures (ventures) 1cuz_NumberOfJointVentures
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ResidentialRealEstateMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_TemcoAssociatesLlcMember