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Segment Disclosures - Summary Information for the Reportable Segments (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2017 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | $ 1,792,141,000 | $ 2,040,486,000 | $ 1,828,305,000
Operating expenses |  |  |  |  |  |  |  |  |  | (666,251,000) | (738,399,000) | (610,679,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 1,125,890,000 | 1,302,087,000 | 1,217,626,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | 38,410,000 | (19,764,000) | (18,988,000)
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 1,164,300,000 | 1,282,323,000 | 1,198,638,000
Addback adjustments |  |  |  |  |  |  |  |  |  | (38,410,000) | 19,764,000 | 18,988,000
Interest income |  |  |  |  |  |  |  |  |  | 56,237,000 | 88,808,000 | 112,184,000
Interest expense |  |  |  |  |  |  |  |  |  | (307,716,000) | (464,403,000) | (479,596,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (534,726,000) | (568,108,000) | (504,905,000)
General and administrative |  |  |  |  |  |  |  |  |  | (88,772,000) | (103,611,000) | (95,965,000)
Transaction costs |  |  |  |  |  |  |  |  |  | (7,963,000) | (9,821,000) | (27,309,000)
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | (166,384,000) | 0 | (108,349,000)
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 356,641,000 | 164,698,000 | 6,377,000
Loss on debt extinguishment |  |  |  |  |  | $ (46,000,000) |  |  |  | (54,227,000) | (46,020,000) | 0
Other income (expense), net |  |  |  |  |  |  |  |  |  | 31,420,000 | 3,654,000 | 16,208,000
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 1,333,000 | (4,473,000) | 9,807,000
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 10,901,000 | 11,360,000 | 6,590,000
Total discontinued operations |  |  |  |  |  | (18,246,000) | $ 108,215,000 | $ 107,378,000 | $ 68,408,000 | 0 | 265,755,000 | (699,086,000)
Net income (loss) |  | $ (57,924,000) | $ (5,720,000) | $ 22,101,000 | $ 464,177,000 | $ 61,300,000 | $ 154,039,000 | $ 304,842,000 | $ 119,745,000 | 422,634,000 | 639,926,000 | (546,418,000)
Corporate and other assets |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating expenses |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Segment NOI |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Addback adjustments |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | (292,169,000) | (407,754,000) | (408,602,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
General and administrative |  |  |  |  |  |  |  |  |  | (88,772,000) | (103,611,000) | (95,965,000)
Transaction costs |  |  |  |  |  |  |  |  |  | (7,963,000) | (9,821,000) | (27,309,000)
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | 0 |  | 0
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | (54,227,000) | (46,020,000) |
Other income (expense), net |  |  |  |  |  |  |  |  |  | (19,475,000) | 3,654,000 | 16,208,000
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 1,333,000 | (4,473,000) | 9,807,000
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 265,755,000 | (699,086,000)
Net income (loss) |  |  |  |  |  |  |  |  |  | (461,273,000) | (302,270,000) | (1,204,947,000)
Senior housing triple-net |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Recoveries (impairments), net |  |  | $ (23,000,000) |  |  |  |  |  |  |  |  |
Senior housing triple-net | Operating segment |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 313,547,000 | 423,118,000 | 428,269,000
Operating expenses |  |  |  |  |  |  |  |  |  | (3,819,000) | (6,710,000) | (3,427,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 309,728,000 | 416,408,000 | 424,842,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | 17,098,000 | (7,566,000) | (9,716,000)
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 326,826,000 | 408,842,000 | 415,126,000
Addback adjustments |  |  |  |  |  |  |  |  |  | (17,098,000) | 7,566,000 | 9,716,000
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | (2,518,000) | (9,499,000) | (16,899,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (103,820,000) | (136,146,000) | (125,538,000)
General and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transaction costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | (22,590,000) |  | 0
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 280,349,000 | 48,744,000 | 6,325,000
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | 461,149,000 | 319,507,000 | 288,730,000
SHOP | Operating segment |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 525,473,000 | 686,822,000 | 518,264,000
Operating expenses |  |  |  |  |  |  |  |  |  | (396,491,000) | (480,870,000) | (371,016,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 128,982,000 | 205,952,000 | 147,248,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | 33,227,000 | (2,686,000) | 8,145,000
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 162,209,000 | 203,266,000 | 155,393,000
Addback adjustments |  |  |  |  |  |  |  |  |  | (33,227,000) | 2,686,000 | (8,145,000)
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | (7,920,000) | (29,745,000) | (31,869,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (103,162,000) | (108,806,000) | (80,981,000)
General and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transaction costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | 0 |  | 0
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 17,485,000 | 675,000 | 0
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | 35,385,000 | 68,076,000 | 34,398,000
Life science |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate, net | $ 45,000,000 |  |  |  |  |  |  |  |  |  |  |
Life science | Operating segment |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 358,816,000 | 358,537,000 | 342,984,000
Operating expenses |  |  |  |  |  |  |  |  |  | (78,001,000) | (72,478,000) | (70,217,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 280,815,000 | 286,059,000 | 272,767,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | (4,517,000) | (2,954,000) | (10,128,000)
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 276,298,000 | 283,105,000 | 262,639,000
Addback adjustments |  |  |  |  |  |  |  |  |  | 4,517,000 | 2,954,000 | 10,128,000
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | (373,000) | (2,357,000) | (2,878,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (128,864,000) | (130,829,000) | (126,241,000)
General and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transaction costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | 0 |  | 0
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 45,916,000 | 49,042,000 | 0
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | 197,494,000 | 201,915,000 | 143,648,000
Medical office | Operating segment |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 477,459,000 | 446,280,000 | 415,351,000
Operating expenses |  |  |  |  |  |  |  |  |  | (183,197,000) | (173,687,000) | (162,054,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 294,262,000 | 272,593,000 | 253,297,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | (2,952,000) | (3,536,000) | (4,933,000)
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 291,310,000 | 269,057,000 | 248,364,000
Addback adjustments |  |  |  |  |  |  |  |  |  | 2,952,000 | 3,536,000 | 4,933,000
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  | (506,000) | (5,895,000) | (9,603,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (169,795,000) | (161,790,000) | (143,682,000)
General and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transaction costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | 0 |  | 0
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 9,095,000 | 8,333,000 | 52,000
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | 133,056,000 | 113,241,000 | 100,064,000
Other non-reportable segments | Operating segment |  |  |  |  |  |  |  |  |  |  |  |
Segment reporting information, revenues |  |  |  |  |  |  |  |  |  |  |  |
Rental Revenues |  |  |  |  |  |  |  |  |  | 116,846,000 | 125,729,000 | 123,437,000
Operating expenses |  |  |  |  |  |  |  |  |  | (4,743,000) | (4,654,000) | (3,965,000)
Segment NOI |  |  |  |  |  |  |  |  |  | 112,103,000 | 121,075,000 | 119,472,000
Non-cash adjustments to NOI |  |  |  |  |  |  |  |  |  | (4,446,000) | (3,022,000) | (2,356,000)
Segment adjusted (cash) NOI |  |  |  |  |  |  |  |  |  | 107,657,000 | 118,053,000 | 117,116,000
Addback adjustments |  |  |  |  |  |  |  |  |  | 4,446,000 | 3,022,000 | 2,356,000
Interest income |  |  |  |  |  |  |  |  |  | 56,237,000 | 88,808,000 | 112,184,000
Interest expense |  |  |  |  |  |  |  |  |  | (4,230,000) | (9,153,000) | (9,745,000)
Depreciation and amortization |  |  |  |  |  |  |  |  |  | (29,085,000) | (30,537,000) | (28,463,000)
General and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Transaction costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries (impairments), net |  |  |  |  |  |  |  |  |  | (143,794,000) |  | (108,349,000)
Gain (loss) on sales of real estate, net |  |  |  |  |  |  |  |  |  | 3,796,000 | 57,904,000 | 0
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | 0 |  |
Other income (expense), net |  |  |  |  |  |  |  |  |  | 50,895,000 | 0 | 0
Income tax benefit (expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity income (loss) from unconsolidated JVs |  |  |  |  |  |  |  |  |  | 10,901,000 | 11,360,000 | 6,590,000
Total discontinued operations |  |  |  |  |  |  |  |  |  |  | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  |  | $ 56,823,000 | $ 239,457,000 | $ 91,689,000

X
- Definition Adjusted NOI is a non-GAAP supplemental financial measure used to evaluate the operating performance of real estate. Adjusted NOI is calculated as NOI after eliminating the effects of straight-line rents, DFL non-cash interest, amortization of market lease intangibles and lease termination fees (?non cash adjustments?). Adjusted NOI is oftentimes referred to as ?cash NOI.? The Company uses adjusted NOI to make decisions about resource allocations, and to assess and compare property level performance. The Company believes that net income (loss) is the most directly comparable U.S. GAAP measure to adjusted NOI. Adjusted NOI should not be viewed as an alternative measure of operating performance to net income (loss) as defined by GAAP since it does not reflect various excluded items. Further, the Company?s definition of Adjusted NOI may not be comparable to the definition used by other REITs or real estate companies, as they may use different methodologies for calculating Adjusted NOI. + References No definition available. + Details
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X
- Definition NOI is a non-GAAP supplemental financial measure used to evaluate the operating performance of real estate. NOI is defined as rental and related revenues, including tenant recoveries, resident fees and services, and income from DFLs, less property level operating expenses; NOI excludes interest income, investment management fee income, depreciation and amortization, interest expense, general and administrative expenses, impairments, impairment recoveries, other income, net, income taxes, and equity income from and impairments of investments in unconsolidated joint ventures. Management believes NOI provides relevant and useful information because it reflects only income and operating expense items that are incurred at the property level and presents them on an unleveraged basis. The Company uses NOI and adjusted NOI to make decisions about resource allocations and to assess and compare property level performance. The Company believes that net income (loss) is the most directly comparable U.S. GAAP measure to NOI. NOI should not be viewed as an alternative measure of operating performance to net income (loss) as defined by GAAP since it does not reflect various excluded items. Further, the Company?s definition of NOI may not be comparable to the definition used by other REITs or real estate companies, as they may use different methodologies for calculating NOI. + References No definition available. + Details
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- Definition Represents straight-line rents, DFL accretion, amortization of market lease intangibles and lease termination fees. + References No definition available. + Details
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- Definition Represents the addback of straight-line rents, DFL accretion, amortization of market lease intangibles and lease termination fees from segment portfolio income to consolidated net income. + References No definition available. + Details
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- Definition The total amount of rental and related revenues, tenant recoveries and income from direct financing leases recognized for the period. + References No definition available. + Details
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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 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: 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=98514028&loc=d3e3602-108585 + 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=84229725&loc=d3e1043-128460 + Details
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: 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=98514028&loc=d3e3602-108585 + Details
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