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Investments in and Advances to Joint Ventures - Additional Information (Detail) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) ShoppingCenter | Mar. 31, 2015 Assets | Jun. 30, 2015 USD ($) ShoppingCenter | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) ShoppingCenter | Jun. 30, 2014 USD ($) | Dec. 31, 2014 ShoppingCenter
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Gain (loss) on change in control of interests |  |  | $ (6,507) | $ 83,830 | $ 7,772 | $ 83,830 |
Property Management Company [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Gain (loss) on change in control of interests | $ (6,500) |  |  |  |  |  |
Percentage of ownership interest transferred | 50.00% |  |  |  |  |  |
Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Number of properties | ShoppingCenter | 184 |  | 184 |  | 184 |  | 188
Coventry II Fund [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Gain (loss) on change in control of interests |  |  |  |  | $ 14,300 |  |
Ownership interest in joint venture |  | 80.00% |  |  |  |  |
Percentage of ownership interest transferred |  | 20.00% |  |  |  |  |
Number of properties sold | Assets |  | 21 |  |  |  |  |

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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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