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Segment Information (Reconciliation of Consolidated Net Operating Income) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Reportable_Segments | Jun. 30, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Consolidated net operating income | $ 92,793 | $ 85,671 | $ 182,933 | $ 170,156
Other income (expense): |  |  |  |
Depreciation and amortization | (52,587) | (49,241) | (105,157) | (98,717)
General and administrative expenses | (6,005) | (7,336) | (14,186) | (13,887)
Interest income | 385 | 122 | 770 | 180
Interest expense | (31,512) | (30,437) | (63,356) | (61,351)
Amortization of deferred financing costs | (1,197) | (1,183) | (2,386) | (2,344)
Interest expense — financing obligation | (316) | (211) | (588) | (429)
Equity in income (loss) of real estate ventures | (489) | 1,508 | (247) | 3,043
Gain (Loss) on sale of undepreciated real estate | (3) | 0 | 1,184 | 0
Gain from remeasurement of investment in real estate ventures | 458 | 7,847 | 458 | 7,847
Gain (loss) on real estate venture transactions | (282) | 3,683 | (417) | 3,683
Loss on early extinguishment of debt | 0 | (1,113) | 0 | (1,116)
Income (loss) from continuing operations | 1,245 | 9,310 | (992) | 7,065
Income (Loss) from Discontinued Operations | 929 | (2,130) | 921 | 4,034
Net income | $ 2,174 | $ 7,180 | $ (71) | $ 11,099
Number of Reportable Segments |  |  | 7 |

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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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