Summarized Financial Information for Unconsolidated Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
Investment In Unconsolidated Affiliates [Line Items]
Investment in real estate	$ 322,923		$ 385,009
Cash and cash equivalents	50,883		21,894		54,183	165,980
Other assets	31,384		22,612
Total assets	1,340,870		669,472
Equity	976,520		558,354
Total liabilities and equity	1,340,870		669,472
Other Affiliates
Investment In Unconsolidated Affiliates [Line Items]
Investment in real estate	12,206		12,124
Cash and cash equivalents	16,429		16,897
Other assets	73		72
Total assets	28,708		29,093
Accounts payable and other liabilities	481		159
Equity	28,227	[1]	28,934	[1]
Total liabilities and equity	$ 28,708		$ 29,093

[1] The majority of the equity in unconsolidated investments relates to ALP. In 2008, the Company wrote-off its investment in ALP as a result of ALP reserving its assets to satisfy potential claims and obligations in accordance with its publicly reported liquidation basis of accounting. Subsequently, ALP 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 ALP’s change in accounting.