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Segment Reporting (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 28, 2015 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) segment | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Segment reporting |  |  |  |  |  |
Number of operating segments | segment |  |  |  | 4 |  |
Number of reportable segments | segment |  |  |  | 3 |  |
Revenues: |  |  |  |  |  |
Rental income |  | $ 155,546 | $ 127,669 | $ 301,329 | $ 239,724 |
Residents fees and services |  | 91,856 | 79,039 | 174,649 | 158,481 |
Total revenues |  | 247,402 | 206,708 | 475,978 | 398,205 |
Expenses: |  |  |  |  |  |
Property operating expenses |  | 93,592 | 79,786 | 179,386 | 157,590 |
Depreciation |  | 62,511 | 46,703 | 116,218 | 85,058 |
General and administrative |  | 11,674 | 9,577 | 22,248 | 17,866 |
Acquisition related costs |  | 4,617 | 2,512 | 5,775 | 2,635 |
Total expenses |  | 172,394 | 138,578 | 323,627 | 263,149 |
Operating income |  | 75,008 | 68,130 | 152,351 | 135,056 |
Interest and other income |  | 142 | 154 | 217 | 258 |
Interest expense |  | (37,907) | (34,112) | (73,848) | (63,012) |
Loss on early extinguishment of debt | $ (1,409) | (39) |  | (1,448) |  |
Income (loss) before income tax expense and equity in earnings of an investee |  | 37,204 | 34,172 | 77,272 | 72,302 |
Income tax expense |  | (129) | (155) | (239) | (346) |
Equity in earnings of an investee |  | 23 | 118 | 95 | 21 |
Income from continuing operations |  | 37,098 | 34,135 | 77,128 | 71,977 |
Discontinued Operations: |  |  |  |  |  |
Loss from discontinued operations |  | (109) | 741 | (350) | 2,041 |
Impairment of assets from discontinued operations |  | (602) | 387 | (602) | (334) |
Income before gain on sale of properties |  | 36,387 | 35,263 | 76,176 | 73,684 |
Gain on sale of properties |  |  | 2,396 |  | 2,552 |
Net income |  | 36,387 | 37,659 | 76,176 | 76,236 |
Total assets |  | 7,348,026 | 6,016,855 | 7,348,026 | 6,016,855 | $ 5,968,269
Triple Net Leased Net Senior Living Communities |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Rental income |  | 61,347 | 55,166 | 116,598 | 110,055 |
Total revenues |  | 61,347 | 55,166 | 116,598 | 110,055 |
Expenses: |  |  |  |  |  |
Depreciation |  | 17,058 | 15,515 | 32,183 | 31,152 |
Total expenses |  | 17,058 | 15,515 | 32,183 | 31,152 |
Operating income |  | 44,289 | 39,651 | 84,415 | 78,903 |
Interest expense |  | (6,270) | (6,472) | (12,255) | (12,860) |
Loss on early extinguishment of debt |  | (6) |  | (6) |  |
Income (loss) before income tax expense and equity in earnings of an investee |  | 38,013 | 33,179 | 72,154 | 66,043 |
Income from continuing operations |  | 38,013 | 33,179 | 72,154 | 66,043 |
Discontinued Operations: |  |  |  |  |  |
Income before gain on sale of properties |  |  | 33,179 |  | 66,043 |
Gain on sale of properties |  |  | 2,396 |  | 2,552 |
Net income |  | 38,013 | 35,575 | 72,154 | 68,595 |
Total assets |  | 2,231,685 | 1,806,867 | 2,231,685 | 1,806,867 |
Managed Senior Living Communities |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Residents fees and services |  | 91,856 | 79,039 | 174,649 | 158,481 |
Total revenues |  | 91,856 | 79,039 | 174,649 | 158,481 |
Expenses: |  |  |  |  |  |
Property operating expenses |  | 69,792 | 60,624 | 132,195 | 121,412 |
Depreciation |  | 13,649 | 8,333 | 22,109 | 16,488 |
Total expenses |  | 83,441 | 68,957 | 154,304 | 137,900 |
Operating income |  | 8,415 | 10,082 | 20,345 | 20,581 |
Interest expense |  | (2,561) | (2,806) | (4,580) | (5,794) |
Loss on early extinguishment of debt |  | (33) |  | (33) |  |
Income (loss) before income tax expense and equity in earnings of an investee |  | 5,821 | 7,276 | 15,732 | 14,787 |
Income from continuing operations |  | 5,821 | 7,276 | 15,732 | 14,787 |
Discontinued Operations: |  |  |  |  |  |
Income before gain on sale of properties |  |  | 7,276 |  | 14,787 |
Net income |  | 5,821 | 7,276 | 15,732 | 14,787 |
Total assets |  | 1,298,982 | 922,557 | 1,298,982 | 922,557 |
MOBs |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Rental income |  | 89,591 | 68,027 | 175,592 | 120,791 |
Total revenues |  | 89,591 | 68,027 | 175,592 | 120,791 |
Expenses: |  |  |  |  |  |
Property operating expenses |  | 23,800 | 19,162 | 47,191 | 36,178 |
Depreciation |  | 30,856 | 21,907 | 60,030 | 35,522 |
Total expenses |  | 54,656 | 41,069 | 107,221 | 71,700 |
Operating income |  | 34,935 | 26,958 | 68,371 | 49,091 |
Interest expense |  | (1,758) | (1,507) | (3,525) | (2,844) |
Income (loss) before income tax expense and equity in earnings of an investee |  | 33,177 | 25,451 | 64,846 | 46,247 |
Income from continuing operations |  | 33,177 | 25,451 | 64,846 | 46,247 |
Discontinued Operations: |  |  |  |  |  |
Loss from discontinued operations |  | (109) | 741 | (350) | 2,041 |
Impairment of assets from discontinued operations |  | (602) | 387 | (602) | (334) |
Income before gain on sale of properties |  |  | 26,579 |  | 47,954 |
Net income |  | 32,466 | 26,579 | 63,894 | 47,954 |
Total assets |  | 3,412,125 | 2,967,167 | 3,412,125 | 2,967,167 |
All Other Operations |  |  |  |  |  |
Revenues: |  |  |  |  |  |
Rental income |  | 4,608 | 4,476 | 9,139 | 8,878 |
Total revenues |  | 4,608 | 4,476 | 9,139 | 8,878 |
Expenses: |  |  |  |  |  |
Depreciation |  | 948 | 948 | 1,896 | 1,896 |
General and administrative |  | 11,674 | 9,577 | 22,248 | 17,866 |
Acquisition related costs |  | 4,617 | 2,512 | 5,775 | 2,635 |
Total expenses |  | 17,239 | 13,037 | 29,919 | 22,397 |
Operating income |  | (12,631) | (8,561) | (20,780) | (13,519) |
Interest and other income |  | 142 | 154 | 217 | 258 |
Interest expense |  | (27,318) | (23,327) | (53,488) | (41,514) |
Loss on early extinguishment of debt |  |  |  | (1,409) |  |
Income (loss) before income tax expense and equity in earnings of an investee |  | (39,807) | (31,734) | (75,460) | (54,775) |
Income tax expense |  | (129) | (155) | (239) | (346) |
Equity in earnings of an investee |  | 23 | 118 | 95 | 21 |
Income from continuing operations |  | (39,913) | (31,771) | (75,604) | (55,100) |
Discontinued Operations: |  |  |  |  |  |
Income before gain on sale of properties |  |  | (31,771) |  | (55,100) |
Net income |  | (39,913) | (31,771) | (75,604) | (55,100) |
Total assets |  | $ 405,234 | $ 320,264 | $ 405,234 | $ 320,264 |

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