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Prepaid Expenses and Other Assets (Details) (USD $) | Jun. 30, 2014 | Dec. 31, 2013
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Prepaid Expense and Other Assets [Abstract] |  |  |  |
Lease incentives | $ 12,101,000 |  | $ 8,435,000 |
Prepaid expenses | 8,392,000 |  | 19,308,000 |
Furniture, fixtures and equipment, net | 6,919,000 |  | 6,556,000 |
Construction contract costs incurred in excess of billings | 6,348,000 |  | 2,462,000 |
Deferred tax asset, net | 4,159,000 | [1] | 4,305,000 | [1]
Other equity method investments | 2,219,000 |  | 2,258,000 |
Interest rate derivatives | 2,151,000 |  | 6,594,000 |
Other assets | 4,570,000 |  | 4,268,000 |
Prepaid expenses and other assets | 46,859,000 |  | 54,186,000 |
Long-term Operating Notes Receivable |  |  |  |
Mortgage and Other Investing Receivables [Line Items] |  |  |  |
Operating notes receivable | 1,700,000 |  | 1,700,000 |
Allowances for estimated losses | 170,000 |  | 87,000 |
Taxable REIT Subsidiary |  |  |  |
Mortgage and Other Investing Receivables [Line Items] |  |  |  |
Deferred tax assets, valuation allowance | $ 2,100,000 |  | $ 2,100,000 |
[1] | Includes a valuation allowance of $2.1 million.

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