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Income Taxes (Tax Effect of Significant Temporary Differences) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
Document Fiscal Year Focus 2014 2013 2012
Tax effect of significant temporary differences representing deferred tax assets and liabilities      
Income from unconsolidated joint ventures $ 2,441us-gaap_DeferredTaxAssetsEquityMethodInvestments $ 7,361us-gaap_DeferredTaxAssetsEquityMethodInvestments  
Land 0cuz_DeferredTaxAssetsResidentialLotsAndOutparcelsBasisDifferential 6,116cuz_DeferredTaxAssetsResidentialLotsAndOutparcelsBasisDifferential  
Long-term incentive equity awards 0us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 2,089us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost  
Interest Carryforward 0cuz_DeferredTaxAssetsInterestCarryforward 13,158cuz_DeferredTaxAssetsInterestCarryforward  
Federal and state tax carryforwards 0cuz_DeferredTaxAssetsOperatingLossCarryforwardsFederalAndState 50,253cuz_DeferredTaxAssetsOperatingLossCarryforwardsFederalAndState  
Other 0us-gaap_DeferredTaxAssetsOther 364us-gaap_DeferredTaxAssetsOther  
Total deferred tax assets 2,441us-gaap_DeferredTaxAssetsGross 79,341us-gaap_DeferredTaxAssetsGross  
Valuation allowance (2,441)us-gaap_DeferredTaxAssetsValuationAllowance (79,341)us-gaap_DeferredTaxAssetsValuationAllowance  
Net deferred tax asset $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet $ 0us-gaap_DeferredTaxAssetsLiabilitiesNet