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Real Estate Properties - Narrative (Details) ft² in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) living_unit nursing_facility community property | May 31, 2018 USD ($) community | Mar. 31, 2018 USD ($) ft² building community property | Feb. 28, 2018 living_unit | Feb. 28, 2018 USD ($) | Feb. 28, 2018 community | Feb. 28, 2018 property | Jan. 31, 2018 ft² living_unit | Jan. 31, 2018 ft² building | Jan. 31, 2018 USD ($) ft² | Jan. 31, 2018 ft² community | Jan. 31, 2018 ft² property | Dec. 31, 2017 USD ($) living_unit property | Nov. 30, 2017 property | Sep. 30, 2018 USD ($) ft² state building community property | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) ft² state living_unit building community property | Sep. 30, 2017 USD ($)
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties owned | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 443 |  | 443 |
Number of buildings owned | building |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 469 |  | 469 |
Number of states in which properties are located | state |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42 |  | 42 |
Assumed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44,386,000 | $ 0
Impairment of assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,525,000 | $ 0 | 5,073,000 | 5,082,000
Gain on sale of properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | 261,916,000 | 0
Proceeds from sale of properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 332,389,000 | 0
Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of properties | $ 2,150,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0
Acquisition | MOBs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |
Number of buildings | building |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |
Cash paid plus assumed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 114,973,000 |
Area of real estate properties (in square feet) | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 535 |  | 535 |
Assumed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,050,000 |
Acquisition | MOBs | Kansas, Missouri And California |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |
Number of buildings | building |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |
Cash paid plus assumed debt |  |  |  |  |  |  |  |  |  | $ 91,698,000 |  |  |  |  |  |  |  |
Area of real estate properties (in square feet) | ft² |  |  |  |  |  |  |  | 400 | 400 | 400 | 400 | 400 |  |  |  |  |  |
Assumed debt |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Acquisition and certain other transaction related costs |  |  |  |  |  |  |  |  |  | 544,000 |  |  |  |  |  |  |  |
Acquisition | MOBs | Virginia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of buildings | building |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid plus assumed debt |  |  | $ 23,275,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate properties (in square feet) | ft² |  |  | 135 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assumed debt |  |  | $ 11,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and certain other transaction related costs |  |  | 525,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition | Five Star | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | 2 |  |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  | 4 |
Cash paid plus assumed debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 66,350,000 |
Assumed debt | $ 16,588,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 33,336,000 |
Number of acquired private pay independent living units | living_unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 366 |
Purchase price excluding closing costs | 23,860,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and certain other transaction related costs | $ 560,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition | Five Star | Senior Living Communities | Alabama and Indiana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Number of acquired private pay independent living units | living_unit |  |  |  |  |  |  |  |  |  |  |  |  | 229 |  |  |  |  |
Purchase price excluding closing costs |  |  |  |  |  |  |  |  |  |  |  |  | $ 39,457,000 |  |  |  |  |
Acquisition and certain other transaction related costs |  |  |  |  |  |  |  |  |  |  |  |  | $ 307,000 |  |  |  |  |
Acquisition | Five Star | Senior Living Communities | Tennessee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties | 2 |  |  |  |  |  |  |  |  |  | 1 | 1 |  |  |  |  |  |
Cash paid plus assumed debt | $ 23,860,000 |  |  |  |  |  |  |  |  | 19,868,000 |  |  |  |  |  |  |  |
Assumed debt | $ 16,588,000 |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Number of acquired private pay independent living units | living_unit | 151 |  |  |  |  |  |  | 88 |  |  |  |  |  |  |  |  |  |
Purchase price excluding closing costs |  |  |  |  |  |  |  |  |  | 19,868,000 |  |  |  |  |  |  |  |
Acquisition and certain other transaction related costs |  |  |  |  |  |  |  |  |  | $ 201,000 |  |  |  |  |  |  |  |
Acquisition | Five Star | Senior Living Communities | Arizona |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties |  |  |  |  |  | 1 | 1 |  |  |  |  |  |  |  |  |  |  |
Cash paid plus assumed debt |  |  |  |  | $ 22,622,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Assumed debt |  |  |  |  | 16,748,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acquired private pay independent living units | living_unit |  |  |  | 127 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price excluding closing costs |  |  |  |  | 22,622,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition and certain other transaction related costs |  |  |  |  | $ 372,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sunrise Senior Living LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of properties |  | $ 78,856,000 | $ 181,154,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of communities sold | community |  | 1 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of properties |  | $ 96,000,000 | $ 217,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 94,348,000 |
Rental income recognized |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 3,505,000 |
Number of real estate properties held-for-sale | community |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  | 3 |
Sunrise Senior Living LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Skilled Nursing Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of properties | $ 1,906,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of properties | 21,865,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental income recognized | $ 650,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 664,000 |
Number of real estate properties held-for-sale | nursing_facility | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition This element represents the aggregate purchase price of real estate properties acquired by the entity during the period. This amount includes cash paid plus debt assumed, if any, and other settlement adjustments but excludes closing costs. + References No definition available. + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
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- Definition The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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