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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 | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2012
Revenue: |  |  |  |
Rental revenue and other |  |  | $ 139,646,000 |
Observatory revenue |  |  | 76,680,000 |
Total revenue |  |  | 216,326,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 112,711,000 |
Operating expenses—overage rent |  |  | 11,000,000 |
Operating expenses—observatory |  |  | 17,150,000 |
Interest |  |  | 5,960,000 |
Depreciation and amortization |  |  | 17,574,000 |
Total expenses |  |  | 164,395,000 |
Net income (loss) |  |  | 51,931,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities | 0 | 0 | 14,816,000 |
Investment in non-controlled entities | 0 | 0 | 88,304,000 | 76,879,000
Empire State Building Co. [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 98,561,000 |
Observatory revenue |  |  | 76,680,000 |
Total revenue |  |  | 175,241,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 89,117,000 |
Operating expenses—overage rent |  |  | 10,894,000 |
Operating expenses—observatory |  |  | 17,150,000 |
Interest |  |  | 0 |
Depreciation and amortization |  |  | 10,997,000 |
Total expenses |  |  | 128,158,000 |
Net income (loss) |  |  | 47,083,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | 13,612,000 |
1333 Broadway Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 11,357,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 11,357,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 5,669,000 |
Operating expenses—overage rent |  |  | 0 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 3,548,000 |
Depreciation and amortization |  |  | 2,186,000 |
Total expenses |  |  | 11,403,000 |
Net income (loss) |  |  | (46,000) |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | (23,000) |
1350 Broadway Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 16,076,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 16,076,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 7,825,000 |
Operating expenses—overage rent |  |  | 0 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 2,412,000 |
Depreciation and amortization |  |  | 3,264,000 |
Total expenses |  |  | 13,501,000 |
Net income (loss) |  |  | 2,575,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | 1,104,000 |
501 Seventh Avenue Associates [Member] |  |  |  |
Revenue: |  |  |  |
Rental revenue and other |  |  | 13,652,000 |
Observatory revenue |  |  | 0 |
Total revenue |  |  | 13,652,000 |
Expenses: |  |  |  |
Operating expenses—rental |  |  | 10,100,000 |
Operating expenses—overage rent |  |  | 106,000 |
Operating expenses—observatory |  |  | 0 |
Interest |  |  | 0 |
Depreciation and amortization |  |  | 1,127,000 |
Total expenses |  |  | 11,333,000 |
Net income (loss) |  |  | 2,319,000 |
Our predecessor's share of equity in net income (loss) of non-controlled entities |  |  | $ 123,000 |

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