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Investments in Unconsolidated Joint Ventures: (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Northwestern Mutual Life (NML) | Dec. 31, 2012 Northwestern Mutual Life (NML) | Dec. 31, 2011 Northwestern Mutual Life (NML) | Dec. 31, 2013 Pacific Premier Retail LP | Dec. 31, 2012 Pacific Premier Retail LP | Dec. 31, 2011 Pacific Premier Retail LP | Dec. 31, 2013 Tysons Corner LLC | Dec. 31, 2012 Tysons Corner LLC | Dec. 31, 2011 Tysons Corner LLC | Dec. 31, 2013 Other Joint Ventures | Dec. 31, 2012 Other Joint Ventures | Dec. 31, 2011 Other Joint Ventures | Dec. 31, 2011 SDG Macerich Properties, L. P. | Dec. 31, 2011 SDG Macerich Properties, L. P.
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Properties, net | $ 3,435,737 | [1] | $ 3,653,631 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets | 295,719 | [1] | 411,862 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets | 3,731,456 | [1] | 4,065,493 | [1] |  |  |  |  | 775,012 | 1,039,742 |  | 356,871 | 409,622 |  |  |  |  |  |
Liabilities and partners' capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable | 3,518,215 | [2] | 3,240,723 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other liabilities | 202,444 | [2] | 148,711 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's capital | (25,367) | [2] | 304,477 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outside partners' capital | 36,164 | [2] | 371,582 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities and partners' capital | 3,731,456 | [2] | 4,065,493 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's capital | (25,367) | [2] | 304,477 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis adjustment | 474,658 | [3] | 516,833 | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures | 449,291 |  | 821,310 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets—Investments in unconsolidated joint ventures | 701,483 |  | 974,258 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities—Distributions in excess of investments in unconsolidated joint ventures | (252,192) |  | (152,948) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  |  |  |  |  | 812,725 | 942,370 |  | 887,413 | 329,145 |  |  |  |  |  |
Mortgage notes payable that could become recourse debt to the Company | 33,540 |  | 51,171 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indemnity of guaranteed amount | 16,770 |  | 21,270 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable to affiliate |  |  |  |  |  | 712,455 | 436,857 |  |  |  |  |  |  |  |  |  |  |  |
Interest expense on borrowings from related party |  |  |  |  |  | 31,549 | 43,732 | 42,451 |  |  |  |  |  |  |  |  |  |  |
Amortization of difference between cost of investments and book value of underlying equity | 10,734 |  | 15,480 |  | 9,257 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum rents | 418,724 |  | 512,002 |  | 633,646 |  |  |  | 118,164 | 132,247 | 133,191 | 62,072 | 63,569 | 63,950 | 238,488 | 316,186 | 351,982 |  | 84,523
Percentage rents | 19,589 |  | 23,087 |  | 31,425 |  |  |  | 4,586 | 5,390 | 6,124 | 2,057 | 1,929 | 2,068 | 12,946 | 15,768 | 18,491 |  | 4,742
Tenant recoveries | 204,171 |  | 250,168 |  | 309,735 |  |  |  | 52,470 | 56,397 | 55,088 | 45,452 | 44,225 | 41,286 | 106,249 | 149,546 | 169,516 |  | 43,845
Other | 45,627 |  | 46,239 |  | 49,720 |  |  |  | 5,882 | 5,650 | 5,248 | 3,110 | 3,341 | 3,061 | 36,635 | 37,248 | 37,743 |  | 3,668
Total revenues | 688,111 |  | 831,496 |  | 1,024,526 |  |  |  | 181,102 | 199,684 | 199,651 | 112,691 | 113,064 | 110,365 | 394,318 | 518,748 | 577,732 |  | 136,778
Expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shopping center and operating expenses | 229,818 |  | 287,234 |  | 364,260 |  |  |  | 53,039 | 59,329 | 59,723 | 36,798 | 35,244 | 34,519 | 139,981 | 192,661 | 218,981 |  | 51,037
Interest expense | 145,322 |  | 199,916 |  | 260,093 |  |  |  | 43,445 | 52,139 | 50,174 | 15,751 | 11,481 | 14,237 | 86,126 | 136,296 | 154,382 |  | 41,300
Depreciation and amortization | 147,309 |  | 177,997 |  | 215,667 |  |  |  | 39,616 | 43,031 | 41,448 | 18,139 | 19,798 | 20,115 | 89,554 | 115,168 | 126,267 |  | 27,837
Total operating expenses | 522,449 |  | 665,147 |  | 840,020 |  |  |  | 136,100 | 154,499 | 151,345 | 70,688 | 66,523 | 68,871 | 315,661 | 444,125 | 499,630 |  | 120,174
Gain on sale of assets | 190,526 |  | 29,301 |  | 389,707 |  |  |  | 182,754 | 90 | 0 | 0 | 0 | 0 | 7,772 | 29,211 | 23,395 | 188,264 | 366,312
Gain on extinguishment of debt | 14 |  |  |  | 15,704 |  |  |  | 0 |  | 0 | 14 |  | 0 | 0 |  | 0 |  | 15,704
Net income | 356,202 |  | 195,650 |  | 589,917 |  |  |  | 227,756 | 45,275 | 48,306 | 42,017 | 46,541 | 41,494 | 86,429 | 103,834 | 101,497 |  | 398,620
Company's equity in net income | $ 167,580 |  | $ 79,281 |  | $ 294,677 |  |  |  | $ 110,798 | $ 23,026 | $ 24,568 | $ 15,126 | $ 17,969 | $ 16,209 | $ 41,656 | $ 38,286 | $ 49,461 |  | $ 204,439
[1] | These amounts include the assets and liabilities of the following joint ventures as of December 31, 2013 and 2012: PacificPremierRetail LP TysonsCorner LLCAs of December 31, 2013 Total Assets$775,012 $356,871Total Liabilities$812,725 $887,413As of December 31, 2012 Total Assets$1,039,742 $409,622Total Liabilities$942,370 $329,145
[2] | Certain mortgage notes payable could become recourse debt to the Company should the joint venture be unable to discharge the obligations of the related debt. As of December 31, 2013 and 2012, a total of $33,540 and $51,171, respectively, could become recourse debt to the Company. As of December 31, 2013 and 2012, the Company has indemnity agreements from joint venture partners for $16,770 and $21,270, respectively, of the guaranteed amount.Included in mortgage notes payable are amounts due to affiliates of Northwestern Mutual Life ("NML") of $712,455 and $436,857 as of December 31, 2013 and 2012, respectively. NML is considered a related party because it is a joint venture partner with the Company in Macerich Northwestern Associates—Broadway Plaza. Interest expense incurred on these borrowings amounted to $31,549, $43,732 and $42,451 for the years ended December 31, 2013, 2012 and 2011, respectively.
[3] | The Company amortizes the difference between the cost of its investments in unconsolidated joint ventures and the book value of the underlying equity into income on a straight-line basis consistent with the lives of the underlying assets. The amortization of this difference was $10,734, $15,480 and $9,257 for the years ended December 31, 2013, 2012 and 2011, respectively.

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- Definition This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity. + 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)(3) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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