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Investments in Unconsolidated Joint Ventures: (Details 2) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 12 Months Ended | 0 Months Ended |  |  |  | 0 Months Ended | 12 Months Ended | 0 Months Ended |  | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  | 0 Months Ended | 3 Months Ended | 0 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  |  | 0 Months Ended | 3 Months Ended |
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Dec. 11, 2013 | Oct. 26, 2012 | Jun. 03, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Oct. 08, 2013 Ridgmar Mall sqft | Jun. 03, 2011 Arrowhead Towne Center | Sep. 17, 2013 Camelback Colonnade | Sep. 16, 2013 Camelback Colonnade | Mar. 30, 2012 Chandler Village Center, LLC sqft | Mar. 30, 2012 Chandler Festival sqft | May 31, 2012 Chandler Gateway sqft | Dec. 31, 2012 Chandler Gateway | Feb. 24, 2011 Kierland Commons Investment LLC | Dec. 31, 2013 Kierland Commons Investment LLC | Aug. 10, 2012 NorthPark Center sqft | Dec. 31, 2013 Pacific Premier Retail LP | Dec. 31, 2012 Pacific Premier Retail LP | Dec. 31, 2011 Pacific Premier Retail LP | Mar. 30, 2012 SanTan Village Power Center sqft | Dec. 31, 2011 SDG Macerich Properties, L. P. | Mar. 31, 2011 SDG Macerich Properties, L. P. | Dec. 31, 2011 SDG Macerich Properties, L. P. item | Dec. 31, 2011 SDG Macerich Properties, L. P. | Mar. 31, 2013 SDG Macerich Properties, L. P. sqft | Jun. 03, 2011 Superstition Springs Center | Feb. 28, 2011 The Shops at Atlas Park | Jun. 12, 2013 Kitsap Mall Pacific Premier Retail LP sqft | Jul. 31, 2013 Redmond Town Center Pacific Premier Retail LP sqft | May 29, 2013 Redmond Town Center Pacific Premier Retail LP sqft | Oct. 26, 2012 Arrowhead Towne Center sqft | Dec. 31, 2013 Arrowhead Towne Center | Sep. 17, 2013 Camelback Colonnade | Dec. 31, 2013 Camelback Colonnade | Sep. 17, 2013 Camelback Colonnade sqft | Feb. 28, 2011 Desert Sky Mall sqft | Dec. 31, 2011 Desert Sky Mall | Dec. 31, 2011 Eastland Mall sqft | Jun. 03, 2011 GGP Exchange | Dec. 31, 2011 Indiana Square Lake Mall sqft | Feb. 24, 2011 Kierland Commons Kierland Commons Investment LLC sqft | Dec. 31, 2011 NorthPark Mall sqft | Dec. 31, 2011 SouthPark Mall sqft | Dec. 31, 2011 Southridge Mall sqft | Oct. 24, 2013 Superstition Springs Land I | Jun. 03, 2011 Superstition Springs Land I sqft | Dec. 31, 2011 Valley Mall sqft | Oct. 03, 2012 FlatIron Crossing sqft | Dec. 31, 2013 FlatIron Crossing | Dec. 31, 2012 FlatIron Crossing
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage |  |  |  |  |  |  | 1,273,000 |  |  |  | 273,000 | 500,000 | 260,000 |  |  |  |  | 1,946,000 |  |  |  |  | 491,000 |  |  |  |  | 1,033,000 |  |  | 846,000 | 695,000 | 582,000 | 1,198,000 |  |  |  | 619,000 | 891,000 |  | 1,043,000 |  | 559,000 | 434,000 | 1,050,000 | 904,000 | 811,000 |  | 1,082,000 | 504,000 | 1,435,000 |  |
Business Combination, Step Acquisition, Additional Equity Interest Acquired, Percentage |  |  |  |  |  |  |  |  | 67.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  | 100.00% | 100.00% |  | 33.30% |  |  |  |  | 33.30% |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  | 33.30% |  |  | 75.00% |  | 75.00%
Purchase price on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 144,400 |  |  |  |  | $ 27,625 |  |  |  |  |  |  |  |  | $ 46,162 |  |  | $ 310,397 |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 53,750 |  |  |  |  |  |  |  |  |  |  |  |  |  | 105,550 |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,162 |  |  |  |  |  |  |  |  |
Purchase price funded by cash payment on acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,025 |  |  |  |  | 1,875 |  |  | 75,000 |  |  |  |  |  | 23,662 |  |  | 195,900 |  |
Purchase price paid through assumption of debt by the Company |  |  |  | 257,064 | 420,123 | 192,566 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,375 |  |  |  |  | 25,750 |  |  |  |  | 18,613 |  |  |  | 22,500 |  |  | 114,497 |  |
Percentage ownership before additional interest acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in joint ventures |  |  |  |  |  |  |  | 66.70% |  | 73.20% |  |  |  |  | 50.00% | 50.00% | [1] |  | 51.00% | [1] |  |  |  | 5000.00% |  | 5000.00% | 5000.00% |  | 66.70% | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total ownership percentage acquired by all joint venture partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Ownership percentage in property on completion of acquisition |  |  | 100.00% |  |  |  |  | 33.30% |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  | 50.00% |  | 100.00% |  |
Other joint venture partners' ownership percentage in joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5000.00% |  | 5000.00% | 5000.00% |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  | 190,526 | 29,301 | 389,707 | 6,243 |  |  |  |  |  |  |  | 25,019 |  |  |  | 182,754 |  | 90 | 0 | 23,294 | 188,264 |  |  | 366,312 |  |  |  | 55,150 | 38,447 | 89,157 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remeasurement gain on acquisition of additional interest, pro rata share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,510 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's share of total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 26,875 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |
Loan paid off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of gain on conveyance of Granite Run Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,753 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on purchase of remaining interest in property |  | 115,729 | 1,734 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 115,729 | 115,729 | 36,341 | 36,341 |  | 1,868 | 1,868 |  |  |  |  |  |  |  | 14,864 |  |  | 84,227 | 84,227 |
Number of regional shopping centers owned by investee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received on sale of joint venture interest |  |  |  |  |  |  |  |  |  |  | 14,795 | 30,975 | 14,315 |  |  |  |  | 118,810 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of investments in unconsolidated entity |  |  |  |  |  |  |  |  |  |  | 8,184 | 12,347 |  | 3,363 |  |  |  | 24,590 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of assets |  |  |  | 416,077 | 136,707 | 16,960 |  |  |  |  | 6,045 | 16,183 | 4,921 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage note assumed by purchaser as sale consideration |  |  |  | 84,000 | 185,000 | 38,968 |  |  |  |  | 8,750 | 14,792 | 9,394 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 54,780 |  |  |  |  |  |  |  | 127,000 | 127,000 | 185,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash distributed to the partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,780 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain recognized on sale |  |  |  |  |  |  | 3,121 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,502 |  |  |  |  |  |  |  | 28,127 | 18,251 | 44,424 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain included in net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,565) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale | 292,500 |  |  |  |  |  | 60,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments on mortgages, bank and other notes payable |  |  |  | 3,051,072 | 2,371,890 | 627,369 | 51,657 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to Co-venture Partner |  |  |  | $ 19,564 | $ 39,479 | $ 40,905 | $ 9,243 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | The Company's ownership interest in this table reflects its legal ownership interest. Legal ownership may, at times, not equal the Company’s economic interest in the listed properties because of various provisions in certain joint venture agreements regarding distributions of cash flow based on capital account balances, allocations of profits and losses and payments of preferred returns. As a result, the Company’s actual economic interest (as distinct from its legal ownership interest) in certain of the properties could fluctuate from time to time and may not wholly align with its legal ownership interests. Substantially all of the Company’s joint venture agreements contain rights of first refusal, buy-sell provisions, exit rights, default dilution remedies and/or other break up provisions or remedies which are customary in real estate joint venture agreements and which may, positively or negatively, affect the ultimate realization of cash flow and/or capital or liquidation proceeds.

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- Definition Represents the number of regional shopping centers owned by the investee. + References No definition available. + Details
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- Definition Amount of gain (loss) from the disposal of an asset through means other than sale, for example, but not limited to, abandonment, spin-off, and expropriation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6390744&loc=d3e2212-110226 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5 + Details
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- Definition This item represents the amount of net sales proceeds received on disposal of an equity method investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=7658923&loc=d3e32847-111569 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition Amount of gain (loss) on sale or disposal of an equity method investment. + References No definition available. + Details
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- Definition The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The value of notes retired (or transferred to another entity) in noncash investing or financing transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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