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Investment in Unconsolidated Joint Ventures (CL Realty, L.L.C.) (Details) (USD $)
Dec. 31, 2014
Venture
CL Realty  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures (ventures) 2cuz_NumberOfJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_ClRealtyLlcMember
Cash balance of joint venture $ 413,000cuz_EquityMethodInvestmentsSummarizedFinancialInformationCash
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_ClRealtyLlcMember
Temco Associates  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures (ventures) 2cuz_NumberOfJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_TemcoAssociatesLlcMember
Cash balance of joint venture $ 196,000cuz_EquityMethodInvestmentsSummarizedFinancialInformationCash
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_TemcoAssociatesLlcMember
Forestar [Member] | CL Realty  
Schedule of Equity Method Investments [Line Items]  
Ownership Percentage of Partner in Joint Venture 5000.00%cuz_OwnershipPercentageOfPartnerInJointVenture
/ us-gaap_LeaseArrangementTypeAxis
= cuz_ForestarMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_ClRealtyLlcMember
Forestar [Member] | Temco Associates  
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] | CL Realty  
Schedule of Equity Method Investments [Line Items]  
Number of joint ventures (ventures) 1cuz_NumberOfJointVentures
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ResidentialRealEstateMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_ClRealtyLlcMember
Residential Real Estate [Member] | Temco Associates  
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
Land | CL Realty  
Schedule of Equity Method Investments [Line Items]  
Number of Real Estate Properties 1us-gaap_NumberOfRealEstateProperties
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= cuz_ClRealtyLlcMember