Dispositions	12 Months Ended
Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	Dispositions: On January 15, 2014, the Company sold Rotterdam Square, a 585,000 square foot regional shopping center in Schenectady, New York, for $8,500, resulting in a loss on the sale of assets of $472. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On February 14, 2014, the Company sold Somersville Towne Center, a 348,000 square foot regional shopping center in Antioch, California, for $12,337, resulting in a loss on the sale of assets of $263. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On March 17, 2014, the Company sold Lake Square Mall, a 559,000 square foot regional shopping center in Leesburg, Florida, for $13,280, resulting in a loss on the sale of assets of $876. The sales price was funded by a cash payment of $3,677 and the issuance of two notes receivable totaling $9,603 (See Note 6—Tenant and Other Receivables, net). The Company used the cash proceeds from the sale to pay down its line of credit and for general corporate purposes. On July 7, 2014, the Company sold a former Mervyn's store in El Paso, Texas for $3,560, resulting in a loss on the sale of assets of $158. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On August 28, 2014, the Company sold a former Mervyn's store in Thousand Oaks, California for $3,500, resulting in a loss on the sale of assets of $80. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On September 11, 2014, the Company sold a leasehold interest in a former Mervyn's store in Laredo, Texas for $1,200, resulting in a gain on the sale of assets of $315. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On October 10, 2014, the Company sold a former Mervyn's store in Marysville, California for $1,900, resulting in a loss on the sale of assets of $3. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On October 31, 2014, the Company sold South Towne Center, a 1,278,000 square foot regional shopping center in Sandy, Utah, for $205,000, resulting in a gain on the sale of assets of $121,873. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On December 29, 2014, the Company sold its 67.5% ownership interest in its consolidated joint venture in Camelback Colonnade, a 619,000 square foot community center in Phoenix, Arizona, for $92,898, resulting in a gain on the sale of assets of $24,554. The sales price was funded by a cash payment of $61,173 and the assumption of the Company's share of the mortgage note payable on the property of $31,725. The Company used the cash proceeds from the sale to pay down its line of credit and for general corporate purposes. As a result of the sale, the Company was discharged of the $47,946 mortgage note payable on the property and $17,217 of noncontrolling interest was reversed. On June 30, 2015, the Company conveyed Great Northern Mall, an 895,000 square foot regional shopping center in Clay, New York, to the mortgage lender by a deed-in-lieu of foreclosure and was discharged from the mortgage note payable. The loan was nonrecourse to the Company. As a result, the Company recognized a loss on the extinguishment of debt of $1,627. On November 19, 2015, the Company sold Panorama Mall, a 312,000 square foot community center in Panorama City, California, for $98,000, resulting in a gain on the sale of assets of $73,726. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On April 13, 2016, the Company sold Capitola Mall, a 586,000 square foot regional shopping center in Capitola, California, for $93,000, resulting in a gain on the sale of assets of $24,894. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On May 31, 2016, the Company sold a former Mervyn's store in Yuma, Arizona, for $3,200, resulting in a loss on the sale of assets of $3,066. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes. On July 15, 2016, the Company conveyed Flagstaff Mall, a 347,000 square foot regional shopping center in Flagstaff, Arizona, to the mortgage lender by a deed-in-lieu of foreclosure and was discharged from the mortgage note payable. The loan was non-recourse to the Company. As a result, the Company recognized a gain on the extinguishment of debt of $5,284 (See Note 8—Mortgage Notes Payable).

Dispositions:

On January 15, 2014, the Company sold Rotterdam Square, a 585,000 square foot regional shopping center in Schenectady, New York, for $8,500, resulting in a loss on the sale of assets of $472. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On February 14, 2014, the Company sold Somersville Towne Center, a 348,000 square foot regional shopping center in Antioch, California, for $12,337, resulting in a loss on the sale of assets of $263. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On March 17, 2014, the Company sold Lake Square Mall, a 559,000 square foot regional shopping center in Leesburg, Florida, for $13,280, resulting in a loss on the sale of assets of $876. The sales price was funded by a cash payment of $3,677 and the issuance of two notes receivable totaling $9,603 (See Note 6—Tenant and Other Receivables, net). The Company used the cash proceeds from the sale to pay down its line of credit and for general corporate purposes.

On July 7, 2014, the Company sold a former Mervyn's store in El Paso, Texas for $3,560, resulting in a loss on the sale of assets of $158. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On August 28, 2014, the Company sold a former Mervyn's store in Thousand Oaks, California for $3,500, resulting in a loss on the sale of assets of $80. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On September 11, 2014, the Company sold a leasehold interest in a former Mervyn's store in Laredo, Texas for $1,200, resulting in a gain on the sale of assets of $315. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On October 10, 2014, the Company sold a former Mervyn's store in Marysville, California for $1,900, resulting in a loss on the sale of assets of $3. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On October 31, 2014, the Company sold South Towne Center, a 1,278,000 square foot regional shopping center in Sandy, Utah, for $205,000, resulting in a gain on the sale of assets of $121,873. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On December 29, 2014, the Company sold its 67.5% ownership interest in its consolidated joint venture in Camelback Colonnade, a 619,000 square foot community center in Phoenix, Arizona, for $92,898, resulting in a gain on the sale of assets of $24,554. The sales price was funded by a cash payment of $61,173 and the assumption of the Company's share of the mortgage note payable on the property of $31,725. The Company used the cash proceeds from the sale to pay down its line of credit and for general corporate purposes. As a result of the sale, the Company was discharged of the $47,946 mortgage note payable on the property and $17,217 of noncontrolling interest was reversed.

On June 30, 2015, the Company conveyed Great Northern Mall, an 895,000 square foot regional shopping center in Clay, New York, to the mortgage lender by a deed-in-lieu of foreclosure and was discharged from the mortgage note payable. The loan was nonrecourse to the Company. As a result, the Company recognized a loss on the extinguishment of debt of $1,627.

On November 19, 2015, the Company sold Panorama Mall, a 312,000 square foot community center in Panorama City, California, for $98,000, resulting in a gain on the sale of assets of $73,726. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On April 13, 2016, the Company sold Capitola Mall, a 586,000 square foot regional shopping center in Capitola, California, for $93,000, resulting in a gain on the sale of assets of $24,894. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On May 31, 2016, the Company sold a former Mervyn's store in Yuma, Arizona, for $3,200, resulting in a loss on the sale of assets of $3,066. The Company used the proceeds from the sale to pay down its line of credit and for general corporate purposes.

On July 15, 2016, the Company conveyed Flagstaff Mall, a 347,000 square foot regional shopping center in Flagstaff, Arizona, to the mortgage lender by a deed-in-lieu of foreclosure and was discharged from the mortgage note payable. The loan was non-recourse to the Company. As a result, the Company recognized a gain on the extinguishment of debt of $5,284 (See Note 8—Mortgage Notes Payable).