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Investments in Non-controlled Entities Summary of Financial Information of Non-consolidated Entities - Statements of Operations (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2012
Revenue: |  |  |  |
Rental revenue and other |  |  | $ 89,415,000 |
Observatory revenue |  |  | 44,052,000 |
Total revenue |  |  | 133,467,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 72,546,000 |
Operating expenses—overage rent |  |  | 14,874,000 |
Operating expenses—observatory |  |  | 10,669,000 |
Interest |  |  | 3,936,000 |
Depreciation and amortization |  |  | 11,664,000 |
Total expenses |  |  | 113,689,000 |
Net income (loss) |  |  | 19,778,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities | 0 | 0 | 7,898,000 |
Investment in non-controlled entities | 0 | 0 | 82,515,000 | 76,879,000
Empire State Building Co. [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 62,866,000 |
Observatory revenue |  |  | 44,052,000 |
Total revenue |  |  | 106,918,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 57,602,000 |
Operating expenses—overage rent |  |  | 14,424,000 |
Operating expenses—observatory |  |  | 10,669,000 |
Interest |  |  | 0 |
Depreciation and amortization |  |  | 7,287,000 |
Total expenses |  |  | 89,982,000 |
Net income (loss) |  |  | 16,936,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | 7,267,000 |
1333 Broadway Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 7,062,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 7,062,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 3,315,000 |
Operating expenses—overage rent |  |  | 0 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 2,369,000 |
Depreciation and amortization |  |  | 1,459,000 |
Total expenses |  |  | 7,143,000 |
Net income (loss) |  |  | (81,000) |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | (41,000) |
1350 Broadway Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 10,622,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 10,622,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 5,051,000 |
Operating expenses—overage rent |  |  | 0 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 1,567,000 |
Depreciation and amortization |  |  | 2,157,000 |
Total expenses |  |  | 8,775,000 |
Net income (loss) |  |  | 1,847,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | 803,000 |
501 Seventh Avenue Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 8,865,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 8,865,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 6,578,000 |
Operating expenses—overage rent |  |  | 450,000 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 0 |
Depreciation and amortization |  |  | 761,000 |
Total expenses |  |  | 7,789,000 |
Net income (loss) |  |  | 1,076,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | $ (131,000) |

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