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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Revenues: |  |  |  |
Rental income | $ 112,297 | $ 108,407 | $ 224,150 | $ 215,435
Residents fees and services | 74,631 | 35,986 | 149,687 | 71,554
Total revenues | 186,928 | 144,393 | 373,837 | 286,989
Expenses: |  |  |  |
Property operating expenses | 74,484 | 39,818 | 148,163 | 78,304
Depreciation | 38,296 | 34,624 | 75,999 | 67,397
General and administrative | 8,168 | 8,068 | 16,816 | 15,753
Acquisition related costs | 292 | 1,829 | 2,187 | 2,694
Impairment of assets | 4,371 |  | 5,675 | 3,071
Total expenses | 125,611 | 84,339 | 248,840 | 167,219
Operating income | 61,317 | 60,054 | 124,997 | 119,770
Interest and other income | 397 | 227 | 570 | 709
Interest expense | (29,567) | (28,120) | (59,131) | (57,009)
Loss on early extinguishment of debt | (105) |  | (105) |
Equity in earnings of an investee | 79 | 76 | 155 | 121
Income before income tax expense | 32,121 | 32,237 | 66,486 | 63,591
Income tax expense | (140) | (43) | (280) | (247)
Income from continuing operations | 31,981 | 32,194 | 66,206 | 63,344
Discontinued operations: |  |  |  |
Income from discontinued operations | 1,513 | 1,057 | 2,523 | 2,259
Impairment of assets from discontinued operations | (27,896) |  | (27,896) |
Net income | 5,598 | 33,251 | 40,833 | 65,603
Other comprehensive income: |  |  |  |
Change in net unrealized gain / loss on investments | (4,404) | (1,315) | 4,360 | 916
Share of comprehensive income of an investee | (73) | (3) | (81) | (4)
Comprehensive income | $ 1,121 | $ 31,933 | $ 45,112 | $ 66,515
Weighted average shares outstanding (in shares) | 188,081 | 162,670 | 186,350 | 162,659
Income from continuing operations per share (in dollars per share) | $ 0.17 | $ 0.20 | $ 0.36 | $ 0.39
(Loss) income from discontinued operations per share (in dollars per share) | $ (0.14) |  | $ (0.14) | $ 0.01
Net income per share (in dollars per share) | $ 0.03 | $ 0.20 | $ 0.22 | $ 0.40

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