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Prepaid Expenses and Other Assets (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
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Mortgage and Other Investing Receivables [Line Items] |  |
Prepaid expenses | $ 23,552 | $ 19,270
Lease incentives | 8,751 | 5,578
Furniture, fixtures and equipment, net | 6,705 | 7,991
Deferred tax asset | 6,222 | 6,612
Construction contract costs incurred in excess of billings | 5,465 | 0
Interest rate derivatives | 5,195 | 0
Other equity method investments | 4,928 | 2,425
Other assets | 3,257 | 2,183
Prepaid expenses and other assets | 64,075 | 44,059
Long-term Operating Notes Receivable |  |
Mortgage and Other Investing Receivables [Line Items] |  |
Operating Notes Receivable Long-term | $ 186 | $ 271

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