Investment in Unconsolidated Joint Ventures (Charlotte Gateway Village, LLC) (Details) (Charlotte Gateway Village LLC [Member], USD $)	12 Months Ended
Dec. 31, 2014 sqft
Schedule of Equity Method Investments [Line Items]
Square footage of real estate property (square feet)	1,100,000us-gaap_AreaOfRealEstateProperty
Percentage of real estate property leased (percent)	100.00%cuz_PercentageOfProjectLeased
Lease Expiration Date	Dec. 31, 2016
Compounded rate of return received by Company (percent)	11.46%
Percentage of Company's income (loss) received in final step of distribution	0.5
Maximum IRR on project (percent)	17.00%cuz_MaximumIrrOnProject
Cash balance of joint venture	$ 3,200,000
Secured Mortgage Note Payable [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding amount of mortgage note payable of joint venture	$ 35,500,000
Maturity date of debt instrument	Dec. 01, 2016
Interest rate on mortgage loan (percent)	6.41%
Bank of America Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage of Partner in Joint Venture	5000.00%

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maximum IRR on project.

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Percentage of project leased.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

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