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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues: |  |  |
Rental income | $ 681,022 | $ 666,200 | $ 630,899
Residents fees and services | 393,797 | 391,822 | 367,874
Total revenues | 1,074,819 | 1,058,022 | 998,773
Expenses: |  |  |
Property operating expenses | 413,430 | 399,790 | 377,579
Depreciation and amortization | 276,861 | 287,831 | 257,783
General and administrative | 103,702 | 46,559 | 42,830
Acquisition and certain other transaction related costs | 547 | 2,085 | 6,853
Impairment of assets | 5,082 | 18,674 | 194
Total expenses | 799,622 | 754,939 | 685,239
Operating income | 275,197 | 303,083 | 313,534
Dividend income | 2,637 | 2,108 | 2,773
Interest and other income | 406 | 430 | 379
Interest expense | (165,019) | (167,574) | (150,881)
Loss on distribution to common shareholders of The RMR Group Inc. common stock | 0 | 0 | (38,437)
Loss on early extinguishment of debt | (7,627) | (526) | (1,894)
Income from continuing operations before income tax expense and equity in earnings of an investee | 105,594 | 137,521 | 125,474
Income tax expense | (454) | (424) | (574)
Equity in earnings of an investee | 608 | 137 | 20
Income from continuing operations | 105,748 | 137,234 | 124,920
Discontinued operations: |  |  |
Loss from discontinued operations | 0 | 0 | (350)
Loss on impairment of assets from discontinued operations | 0 | 0 | (602)
Income before gain on sale of properties | 105,748 | 137,234 | 123,968
Gain on sale of properties | 46,055 | 4,061 | 0
Net income | 151,803 | 141,295 | 123,968
Net income attributable to noncontrolling interest | (4,193) | 0 | 0
Net income attributable to common shareholders | 147,610 | 141,295 | 123,968
Other comprehensive income: |  |  |
Unrealized gain (loss) on investments in available for sale securities | 47,138 | 64,139 | (35,846)
Amounts reclassified from cumulative other comprehensive income to net income | 5,082 | 2,795 | 0
Equity in unrealized gain (loss) of an investee | 462 | 152 | (20)
Other comprehensive income | 52,682 | 67,086 | (35,866)
Comprehensive income | 204,485 | 208,381 | 88,102
Comprehensive income attributable to noncontrolling interest | (4,193) | 0 | 0
Comprehensive income attributable to common shareholders | $ 200,292 | $ 208,381 | $ 88,102
Weighted average shares used in computing earnings per common share: |  |  |
Weighted average common shares outstanding (basic) (in shares) | 237,420 | 237,345 | 232,931
Weighted average common shares outstanding (diluted) (in shares) | 237,452 | 237,382 | 232,963
Per common share amounts (basic and diluted) |  |  |
Income from continuing operations (in dollars per share) | $ 0.62 | $ 0.60 | $ 0.54
Loss from discontinued operations (in dollars per share) | 0.00 | 0.00 | (0.01)
Net income attributable to common shareholders (in dollars per share) | $ 0.62 | $ 0.60 | $ 0.53

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