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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Revenues: |  |  |  |
Rental income | $ 137,614 | $ 112,319 | $ 377,339 | $ 336,468
Residents fees and services | 79,259 | 74,946 | 237,740 | 224,634
Total revenues | 216,873 | 187,265 | 615,079 | 561,102
Expenses: |  |  |  |
Property operating expenses | 82,706 | 74,729 | 240,297 | 222,893
Depreciation | 50,074 | 38,473 | 135,132 | 114,472
General and administrative | 10,384 | 7,798 | 28,250 | 24,615
Acquisition related costs | 15 | 396 | 2,649 | 2,590
Impairment of assets |  |  |  | 5,675
Total expenses | 143,179 | 121,396 | 406,328 | 370,245
Operating income | 73,694 | 65,869 | 208,751 | 190,857
Interest and other income | 78 | 42 | 336 | 612
Interest expense | (36,201) | (29,405) | (99,213) | (88,536)
Loss on early extinguishment of debt |  | (692) |  | (797)
Income from continuing operations before income tax expense and equity in earnings of an investee | 37,571 | 35,814 | 109,874 | 102,136
Income tax expense | (156) | (125) | (502) | (405)
Equity in earnings of an investee | 38 | 64 | 59 | 219
Income from continuing operations | 37,453 | 35,753 | 109,431 | 101,950
Discontinued operations: |  |  |  |
Income from discontinued operations | (557) | 1,231 | 1,484 | 3,762
Impairment of assets from discontinued operations | 216 |  | (117) | (27,896)
Income before gain on sale of properties | 37,112 | 36,984 | 110,798 | 77,816
Gain on sale of properties |  | 1,141 | 2,552 | 1,141
Net income | 37,112 | 38,125 | 113,350 | 78,957
Other comprehensive income: |  |  |  |
Change in net unrealized (loss) / gain on investments | (5,404) | (2,166) | (6,684) | 2,195
Share of comprehensive income (loss) of an investee | (33) | 13 | 17 | (68)
Comprehensive income | $ 31,675 | $ 35,972 | $ 106,683 | $ 81,084
Weighted average shares outstanding (in shares) | 203,792 | 188,102 | 197,317 | 186,942
Income from continuing operations per share (in dollars per share) | $ 0.18 | $ 0.19 | $ 0.56 | $ 0.55
Income from discontinued operations per share (in dollars per share) |  | $ 0.01 | $ 0.01 | $ (0.13)
Net income per share (in dollars per share) | $ 0.18 | $ 0.20 | $ 0.57 | $ 0.42

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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=34752592&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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