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v3.6.0.2

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues: |  |  |
Rental revenue | $ 460,653 | $ 447,784 | $ 400,825
Tenant expense reimbursement | 73,459 | 79,516 | 67,651
Observatory revenue | 124,814 | 112,172 | 111,541
Construction revenue | 0 | 1,981 | 38,648
Third-party management and other fees | 1,766 | 2,133 | 2,376
Other revenue and fees | 17,308 | 14,048 | 14,285
Total revenues | 678,000 | 657,634 | 635,326
Operating expenses: |  |  |
Property operating expenses | 153,850 | 158,638 | 148,676
Ground rent expense | 9,326 | 9,326 | 5,339
General and administrative expenses | 49,078 | 38,073 | 39,037
Observatory expenses | 29,833 | 32,174 | 31,413
Construction expenses | 0 | 3,222 | 38,596
Real estate taxes | 96,061 | 93,165 | 82,131
Acquisition expenses | 98 | 193 | 3,382
Depreciation and amortization | 155,211 | 171,474 | 145,431
Total operating expenses | 493,457 | 506,265 | 494,005
Total operating income | 184,543 | 151,369 | 141,321
Interest expense | (71,147) | (67,492) | (66,456)
Income before income taxes | 113,396 | 83,877 | 74,865
Income tax expense | (6,146) | (3,949) | (4,655)
Net income | 107,250 | 79,928 | 70,210
Private perpetual preferred unit distributions | (936) | (936) | (476)
Net income attributable to common unitholders | $ 106,314 | $ 78,992 | $ 69,734
Total weighted average units: |  |  |
Basic (in units) | 276,848 | 265,914 | 254,506
Diluted (in units) | 277,568 | 265,914 | 254,506
Net income per unit: |  |  |
Basic net income per unit (in dollars per unit) | $ 0.38 | $ 0.29 | $ 0.27
Diluted net income per unit (in dollars per unit) | $ 0.38 | $ 0.29 | $ 0.27

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