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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, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Revenues: |  |  |  |
Rental income | $ 127,669 | $ 112,297 | $ 239,724 | $ 224,150
Residents fees and services | 79,039 | 74,631 | 158,481 | 149,687
Total revenues | 206,708 | 186,928 | 398,205 | 373,837
Expenses: |  |  |  |
Property operating expenses | 79,786 | 74,484 | 157,590 | 148,163
Depreciation | 46,703 | 38,296 | 85,058 | 75,999
General and administrative | 9,577 | 8,168 | 17,866 | 16,816
Acquisition related costs | 2,512 | 292 | 2,635 | 2,187
Impairment of assets |  | 4,371 |  | 5,675
Total expenses | 138,578 | 125,611 | 263,149 | 248,840
Operating income | 68,130 | 61,317 | 135,056 | 124,997
Interest and other income | 154 | 397 | 258 | 570
Interest expense | (34,112) | (29,567) | (63,012) | (59,131)
Loss on early extinguishment of debt |  | (105) |  | (105)
Income from continuing operations before income tax expense and equity in earnings of an investee | 34,172 | 32,042 | 72,302 | 66,331
Income tax expense | (155) | (140) | (346) | (280)
Equity in earnings of an investee | 118 | 79 | 21 | 155
Income from continuing operations | 34,135 | 31,981 | 71,977 | 66,206
Discontinued operations: |  |  |  |
Income from discontinued operations | 741 | 1,513 | 2,041 | 2,523
Impairment of assets from discontinued operations | 387 | (27,896) | (334) | (27,896)
Income before gain on sale of properties | 35,263 | 5,598 | 73,684 | 40,833
Gain on sale of properties | 2,396 |  | 2,552 |
Net income | 37,659 | 5,598 | 76,236 | 40,833
Other comprehensive income: |  |  |  |
Change in net unrealized (loss) / gain on investments | 640 | (4,404) | (1,280) | 4,360
Share of comprehensive income (loss) of an investee | 31 | (73) | 50 | (81)
Comprehensive income | $ 38,330 | $ 1,121 | $ 75,006 | $ 45,112
Weighted average shares outstanding (in shares) | 199,810 | 188,081 | 194,025 | 186,350
Income from continuing operations per share (in dollars per share) | $ 0.18 | $ 0.17 | $ 0.38 | $ 0.36
Income from discontinued operations per share (in dollars per share) | $ 0.01 | $ (0.14) | $ 0.01 | $ (0.14)
Net income per share (in dollars per share) | $ 0.19 | $ 0.03 | $ 0.39 | $ 0.22

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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