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Investments in Unconsolidated Joint Ventures: Narrative (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |
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Jan. 14, 2016 USD ($) ft² | Jan. 06, 2016 USD ($) ft² | Oct. 30, 2015 USD ($) ft² | Apr. 30, 2015 USD ($) store | Feb. 17, 2015 USD ($) ft² | Dec. 29, 2014 USD ($) | Nov. 20, 2014 USD ($) ft² | Nov. 14, 2014 USD ($) ft² mall | Aug. 28, 2014 USD ($) ft² | Jul. 30, 2014 USD ($) ft² | Jun. 04, 2014 USD ($) ft² | Oct. 24, 2013 USD ($) | Oct. 08, 2013 USD ($) ft² | Aug. 01, 2013 USD ($) ft² | Jun. 12, 2013 USD ($) ft² | May. 29, 2013 USD ($) ft² | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Nov. 13, 2014 USD ($) ft² | Sep. 17, 2013 ft²
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,850 | $ 3,643 | $ 190,526 |  |
Purchase price paid through assumption of debt by the Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 1,414,659 | 257,064 |  |
Payments on mortgages, bank and other notes payable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,284,213 | 853,080 | 3,051,072 |  |
Distributions to co-venture partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,498 | 15,555 | 19,564 |  |
Arrowhead Towne Center | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  | 1,197,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest in the loan assumed by a third party (as a percent) |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale |  | $ 284,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment |  | 124,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumption of debt |  | $ 160,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ridgmar Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  | 1,273,000 |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,243 |  |  |  |  |  |  |  |
Gain recognized on sale |  |  |  |  |  |  |  |  |  |  |  |  | 3,121 |  |  |  |  |  |  |  |
Proceeds from sale |  |  |  |  |  |  |  |  |  |  |  |  | 60,900 |  |  |  |  |  |  |  |
Payments on mortgages, bank and other notes payable |  |  |  |  |  |  |  |  |  |  |  |  | 51,657 |  |  |  |  |  |  |  |
Distributions to co-venture partner |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,243 |  |  |  |  |  |  |  |
Wilshire Boulevard |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  | 40,000 |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  | $ 9,033 |  |  |  |  |  |  |  |  | 9,033 |  |  |
Purchase price funded by cash payment on acquisition |  |  |  |  |  |  |  |  | 15,386 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price paid through assumption of debt by the Company |  |  |  |  |  |  |  |  | $ 1,714 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale |  |  |  |  |  |  |  |  | $ 17,100 |  |  |  |  |  |  |  |  |  |  |  |
Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 311,194 |  |  |  |
Proceeds from sale |  |  | $ 1,258,643 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Camelback Colonnade |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67.50%
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 619,000
Proceeds from sale |  |  |  |  |  | $ 92,898 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment |  |  |  |  |  | 61,173 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumption of debt |  |  |  |  |  | $ 31,725 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73.20%
Kierland Commons Investment LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ (7,044) | $ 182,754 |  |
Twenty Ninth Street | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² | 850,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Kitsap Mall | Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 846,000 |  |  |  |  |  |
Proceeds from sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 127,000 |  |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55,150 |  |  |  |  |  |
Gain recognized on sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,127 |  |  |  |  |  |
Redmond Town Center | Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  | 695,000 |  | 582,000 |  |  |  |  |
Proceeds from sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 127,000 |  | $ 185,000 |  |  |  |  |
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,447 |  | 89,157 |  |  |  |  |
Gain recognized on sale |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,251 |  | $ 44,424 |  |  |  |  |
The Gallery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  | 1,376,000 |  |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  |  |  |  |  |  | $ 106,800 |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percentage purchased |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Candlestick Point |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |
Candlestick Point | Notes Receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Note receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 65,130 |
Description of variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR |  |  |  |
Candlestick Point | Notes Receivable | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |
Lakewood Center | PPR Queens Portfolio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  | 2,075,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Los Cerritos Center | Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  | 1,292,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Los Cerritos Center | PPR Queens Portfolio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
South Plains Mall | PPR Queens Portfolio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  | 1,127,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deptford Mall | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² | 1,040,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FlatIron Crossing | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² | 1,430,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depford Mall, FlatIron Crossing, Twenty Ninth Street [Member] | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest sold | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale | $ 750,980 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment | 458,110 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumption of debt | $ 292,870 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inland Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  | 866,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  | $ 51,250 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price funded by cash payment on acquisition |  |  |  |  | 26,250 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price paid through assumption of debt by the Company |  |  |  |  | 25,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan paid off |  |  |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sears Locations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Stores | store |  |  |  | 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percentage purchased |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Superstition Springs Land I |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased |  |  |  |  |  |  |  |  |  |  |  | 33.30% |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  |  |  |  |  |  |  |  | $ 46,162 |  |  |  |  |  |  |  |  |
Purchase price funded by cash payment on acquisition |  |  |  |  |  |  |  |  |  |  |  | 23,662 |  |  |  |  |  |  |  |  |
Purchase price paid through assumption of debt by the Company |  |  |  |  |  |  |  |  |  |  |  | $ 22,500 |  |  |  |  |  |  |  |  |
Cascade Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased |  |  |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  |  |  |  | 589,000 |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  |  |  |  |  |  |  | $ 15,233 |  |  |  |  |  |  |  |  |  |
PPR Queens Portfolio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased |  |  |  |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  |  |  |  | $ 1,838,886 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price paid through assumption of debt by the Company |  |  |  |  |  |  |  | $ 672,109 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shopping centers | mall |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |
Equity issued (in shares) |  |  |  |  |  |  |  | $ 1,166,777 |  |  |  |  |  |  |  |  |  |  |  |  |
PPR Queens Portfolio | Lakewood Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  | 2,075,000 |  |  |  |  |  |  |  |  |  |  |  |  |
PPR Queens Portfolio | Queens Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  | 966,000 |  |  |  |  |  |  |  |  |  |  |  |  |
PPR Queens Portfolio | Stonewood Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  |  | 932,000 |  |  |  |  |  |  |  |  |  |  |  |  |
PPR Queens Portfolio | Washington Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  | 1,441,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
443 Wabash MAB LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property square footage | ft² |  |  |  |  |  |  | 65,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price on acquisition |  |  |  |  |  |  | $ 18,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture ownership percentage purchased |  |  |  |  |  |  | 45.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
The Macerich Company [Member] | Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale |  |  | $ 545,643 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Joint Venture [Member] | Pacific Premier Retail LP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in unconsolidated joint ventures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price paid through assumption of debt by the Company |  |  | $ 713,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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