| **Real Estate Joint Ventures (Tables)**                            | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| **Real Estate Joint Ventures [Abstract]**                          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Summarized Balance Sheets for Unconsolidated Investments           | Summarized financial information for the unconsolidated investments on a combined basis is as follows:  September 30, 2013 December 31,2012BALANCE SHEETS:   Investment in real estate$12,407 $12,381Cash and cash equivalents17,491 18,523Other assets145 130Total assets$30,043 $31,034    Accounts payable and other liabilities$1,080 $761Equity(1)28,963 30,273Total liabilities and equity$30,043 $31,034 (1)  The majority of the equity in unconsolidated investments relates to ALP Liquidating Trust (the "Trust"). In 2008, the       Company wrote-off its investment in the Trust as a result of the Trust reserving its assets to satisfy potential claims and obligations in accordance with its publicly reported liquidation basis of accounting. Subsequently, the Trust changed its method of accounting to a going concern basis and reinstated its equity and stated it would report certain expenses as they are incurred. The Company has not recorded any additional equity income as a result of the Trust’s change in accounting. |
| Summarized Statements of Operations for Unconsolidated Investments |  Three Months Ended  September 30, Nine Months Ended  September 30, 2013 2012 2013 2012STATEMENTS OF OPERATIONS:       Total expenses$388 $372 $1,170 $846Net loss$388 $372 $1,170 $846                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |

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