Impairment Losses	12 Months Ended
Dec. 31, 2012
Impairment Losses [Abstract]
IMPAIRMENT LOSSES	IMPAIRMENT LOSSES During 2012, the Company incurred an impairment loss of $488,000 on its investment in Verde Realty (“Verde”), a cost method investment in a non-public real estate investment trust, as a result of a merger of Verde into another company at a price per share less than the Company's carrying amount. In 2011, management began a strategic review and analysis of the Company's residential and land businesses, as well as certain of its operating properties, in an attempt to determine the most effective way to maximize the value of its holdings. In February 2012, the Company determined that it would liquidate its holdings of certain non-core assets in bulk on a more accelerated timeline and at lower prices than initially planned and re-deploy this capital, primarily into office properties within its core markets. As part of this process, in the fourth quarter of 2011, the Company revised the cash flow projections for its residential holdings as well as two operating properties that were being held for long term investment opportunities. The cash flow revisions reflected a higher probability that the Company would sell the assets in the short term than holding them for long term investment and development opportunities. These cash flow revisions indicated that the undiscounted cash flows of 12 residential and land projects, as well as two operating properties, were less than their carrying amounts, and the Company recorded impairment losses of $104.3 million to adjust these carrying amounts to fair value. The Company reclassified $7.6 million of these amounts to discontinued operations in 2012. Earlier in 2011, the Company recorded an other-than-temporary impairment loss of $3.5 million on its investment in Verde to adjust the carrying amount of the Company's investment to fair value, as a result of an analysis performed in connection with Verde's withdrawal of its proposed public offering. During 2010, the Company recorded an impairment loss of $2.0 million on Handy Road, an encumbered, undeveloped parcel of land in suburban Atlanta, Georgia that the Company was holding for future development or sale, because the Company determined that it would convey the land to the bank through foreclosure. In addition, in 2010, the Company recorded an impairment loss of $586,000 on 60 North Market, a multi-family residential project in Asheville, North Carolina, because it determined the estimated selling prices of the units had declined since its acquisition. Impairment Losses – Unconsolidated Joint Ventures In 2011, Temco Associates (“Temco”) and CL Realty, L.L.C. (“CL Realty”) recorded impairment losses in income from unconsolidated joint ventures on assets held by each entity. During 2011, Temco and CL Realty updated cash flow projections for their projects and determined the cash flows to be generated by certain projects were less than their carrying amounts. Consequently, Temco and CL Realty recorded impairment losses to record these assets at fair value, the Company's share of which was $14.6 million for Temco and $13.6 million for CL Realty. In addition, in 2011, the Company recorded a $608,000 impairment loss on its investment in Temco due to basis differences stemming from impairment losses at the joint venture level. In 2010, CL Realty recognized an impairment loss as a result of a decision to sell rather than develop a parcel of land in Padre Island, Texas, which required CL Realty to reduce the carrying cost of the parcel to fair value. The Company's share of this impairment loss was $2.2 million. Fair Value Considerations for Property The Company is required to assess the fair value of its impaired consolidated real estate assets and the value of its unconsolidated joint venture investments with indicators of impairment. The value of impaired real estate assets and investments is determined using widely accepted valuation techniques, including discounted cash flow analyses on the expected cash flow of each asset, as well as the income capitalization approach, which considers prevailing market capitalization rates, analyses of recent comparable sales transactions, information from actual sales negotiations and bona fide purchase offers received from third parties. In general, the Company considers multiple valuation techniques when measuring fair value. However, in certain circumstances, a single valuation technique may be more appropriate. The fair value measurements used in these evaluations are considered to be Level 3 valuations within the fair value hierarchy in the accounting rules, as there are significant unobservable inputs. Examples of inputs the Company utilizes in its fair value calculations are discount rates, market capitalization rates, expected lease rental rates, timing of new leases, an estimate of future sales prices and comparable sales prices of similar assets, if available. All of the impairment charges outlined above were recorded in the statements of comprehensive income, either in costs and expenses or within income (loss) from unconsolidated joint ventures.

IMPAIRMENT LOSSES

During 2012, the Company incurred an impairment loss of $488,000 on its investment in Verde Realty (“Verde”), a cost method investment in a non-public real estate investment trust, as a result of a merger of Verde into another company at a price per share less than the Company's carrying amount.

In 2011, management began a strategic review and analysis of the Company's residential and land businesses, as well as certain of its operating properties, in an attempt to determine the most effective way to maximize the value of its holdings. In February 2012, the Company determined that it would liquidate its holdings of certain non-core assets in bulk on a more accelerated timeline and at lower prices than initially planned and re-deploy this capital, primarily into office properties within its core markets. As part of this process, in the fourth quarter of 2011, the Company revised the cash flow projections for its residential holdings as well as two operating properties that were being held for long term investment opportunities. The cash flow revisions reflected a higher probability that the Company would sell the assets in the short term than holding them for long term investment and development opportunities. These cash flow revisions indicated that the undiscounted cash flows of 12 residential and land projects, as well as two operating properties, were less than their carrying amounts, and the Company recorded impairment losses of $104.3 million to adjust these carrying amounts to fair value. The Company reclassified $7.6 million of these amounts to discontinued operations in 2012. Earlier in 2011, the Company recorded an other-than-temporary impairment loss of $3.5 million on its investment in Verde to adjust the carrying amount of the Company's investment to fair value, as a result of an analysis performed in connection with Verde's withdrawal of its proposed public offering.

During 2010, the Company recorded an impairment loss of $2.0 million on Handy Road, an encumbered, undeveloped parcel of land in suburban Atlanta, Georgia that the Company was holding for future development or sale, because the Company determined that it would convey the land to the bank through foreclosure. In addition, in 2010, the Company recorded an impairment loss of $586,000 on 60 North Market, a multi-family residential project in Asheville, North Carolina, because it determined the estimated selling prices of the units had declined since its acquisition.

Impairment Losses – Unconsolidated Joint Ventures

In 2011, Temco Associates (“Temco”) and CL Realty, L.L.C. (“CL Realty”) recorded impairment losses in income from unconsolidated joint ventures on assets held by each entity. During 2011, Temco and CL Realty updated cash flow projections for their projects and determined the cash flows to be generated by certain projects were less than their carrying amounts. Consequently, Temco and CL Realty recorded impairment losses to record these assets at fair value, the Company's share of which was $14.6 million for Temco and $13.6 million for CL Realty. In addition, in 2011, the Company recorded a $608,000 impairment loss on its investment in Temco due to basis differences stemming from impairment losses at the joint venture level.

In 2010, CL Realty recognized an impairment loss as a result of a decision to sell rather than develop a parcel of land in Padre Island, Texas, which required CL Realty to reduce the carrying cost of the parcel to fair value. The Company's share of this impairment loss was $2.2 million.

Fair Value Considerations for Property

The Company is required to assess the fair value of its impaired consolidated real estate assets and the value of its unconsolidated joint venture investments with indicators of impairment. The value of impaired real estate assets and investments is determined using widely accepted valuation techniques, including discounted cash flow analyses on the expected cash flow of each asset, as well as the income capitalization approach, which considers prevailing market capitalization rates, analyses of recent comparable sales transactions, information from actual sales negotiations and bona fide purchase offers received from third parties. In general, the Company considers multiple valuation techniques when measuring fair value. However, in certain circumstances, a single valuation technique may be more appropriate.

The fair value measurements used in these evaluations are considered to be Level 3 valuations within the fair value hierarchy in the accounting rules, as there are significant unobservable inputs. Examples of inputs the Company utilizes in its fair value calculations are discount rates, market capitalization rates, expected lease rental rates, timing of new leases, an estimate of future sales prices and comparable sales prices of similar assets, if available. All of the impairment charges outlined above were recorded in the statements of comprehensive income, either in costs and expenses or within income (loss) from unconsolidated joint ventures.