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Prepaid Expenses and Other Assets | 9 Months Ended
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Sep. 30, 2012
Prepaid Expense and Other Assets [Abstract] |
Prepaid Expenses and Other Assets | Prepaid Expenses and Other Assets Prepaid expenses and other assets consisted of the following (in thousands):
| September 30, 2012 |  | December 31, 2011
Mortgage and other investing receivables | $ | 40,761 |  |  | $ | 27,998 |
Prepaid expenses | 24,396 |  |  | 20,035 |
Furniture, fixtures and equipment, net | 8,657 |  |  | 10,177 |
Deferred tax asset | 6,666 |  |  | 10,892 |
Lease incentives | 5,595 |  |  | 5,233 |
Other assets | 6,472 |  |  | 13,284 |
Prepaid expenses and other assets | $ | 92,547 |  |  | $ | 87,619 |
Mortgage and Other Investing Receivables Mortgage and other investing receivables consisted of the following (in thousands):
| September 30, 2012 |  | December 31, 2011
Notes receivable from City of Huntsville | $ | 30,623 |  |  | $ | 17,741 |
Mortgage loans receivable | 10,138 |  |  | 10,257 |
| $ | 40,761 |  |  | $ | 27,998 |
Our notes receivable from the City of Huntsville funded infrastructure costs in connection with our LW Redstone Company, LLC joint venture (see Note 5). Our mortgage loans receivable reflected above consists of two loans secured by properties in Greater Baltimore and the Baltimore/Washington Corridor. We did not have an allowance for credit losses in connection with these receivables at September 30, 2012 or December 31, 2011. The fair value of our mortgage and other investing receivables totaled $40.7 million at September 30, 2012 and $28.0 million at December 31, 2011. Operating Notes Receivable We had operating notes receivable due from tenants with terms exceeding one year totaling $373,000 at September 30, 2012 and $530,000 at December 31, 2011. We carried allowances for estimated losses for most of these balances.

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