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Segment Information Segment Information (Reconciliation of Consolidated Net Operating Income) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 Reportable_Segments | Jun. 30, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Consolidated net operating income | $ 85,851 | $ 80,668 | $ 170,494 | $ 161,879
Less: |  |  |  |
Interest expense | (30,437) | (32,981) | (61,351) | (67,125)
Interest expense — amortization of deferred financing costs | (1,183) | (1,261) | (2,344) | (2,572)
Depreciation and amortization | (49,300) | (47,476) | (98,846) | (95,350)
General and administrative expenses | 7,335 | 6,079 | 13,886 | 12,129
Plus: |  |  |  |
Interest income | 122 | 1,838 | 180 | 2,320
Interest expense — financing obligation | (211) | (196) | (429) | (378)
Equity in income of real estate ventures | 1,508 | 838 | 3,043 | 882
Gain from remeasurement of investment in a real estate venture | 7,847 | 0 | 7,847 | 0
Net gain (loss) on real estate venture transactions | 3,683 |  | 3,683 | 0
Gains (Losses) on Sales of Investment Real Estate |  | (11) |  | (11)
Loss on early extinguishment of debt | (1,113) | (1,250) | (1,116) | (1,498)
Income (loss) from continuing operations | 9,432 | (5,910) | 7,275 | (13,982)
Income (Loss) from Discontinued Operations | (2,252) | 12,712 | 3,824 | 30,120
Net income (loss) | $ 7,180 | $ 6,802 | $ 11,099 | $ 16,138
Number of Reportable Segments |  |  | 7 |

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