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Indebtedness - Narrative (Details) | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 28, 2023 USD ($) | Jan. 31, 2023 USD ($) | Oct. 31, 2022 USD ($) | Jul. 31, 2022 USD ($) | Jun. 30, 2022 USD ($) | Apr. 30, 2022 USD ($) property | Feb. 28, 2022 USD ($) | Feb. 28, 2021 USD ($) | Feb. 07, 2021 | Jan. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) property | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) property | Dec. 31, 2019 | Feb. 24, 2023 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Jan. 30, 2021 USD ($)
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 | $ 800,000,000 |  |  |  |  |  |
Loss on modification or early extinguishment of debt |  |  |  |  |  |  |  |  |  |  | $ 30,043,000 | 2,410,000 | $ 427,000 |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  |  |  |  |  |  | 379 |  |  |  |  |  |  |
Total real estate properties, gross |  |  |  |  |  |  |  |  |  |  | $ 6,692,543,000 | 6,813,556,000 |  |  |  |  |  |
Repayments of borrowings on revolving credit facility |  |  |  |  |  |  |  |  |  |  | 100,000,000 | 0 | $ 968,000,000 |  |  |  |  |
Accrued interest |  |  |  |  |  |  |  |  |  |  | $ 29,417,000 | 29,845,000 |  |  |  |  |  |
Debt ratio |  |  |  |  |  |  |  |  |  |  | 150.00% |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 450,000,000 |  |  |
Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floating rate debt |  |  |  |  |  |  |  |  |  |  | $ 700,000,000 | 800,000,000 |  |  |  |  |  |
Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  | 2,350,000,000 | $ 2,850,000,000 |  |  |  |  |  |
Medical Office |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |  |  |
Credit Facility | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured revolving credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 700,000,000 |  |  | $ 800,000,000 | $ 700,000,000 |  |  |  |  |  |  | $ 1,000,000,000
Credit facility, interest rate payable (as a percent) |  |  |  |  |  |  |  |  |  |  | 6.90% |  |  |  |  |  |  |
Loan commitment fee percentage |  |  |  |  |  |  |  |  |  |  | 0.30% |  |  |  |  |  |  |
Weighted average interest rate on debt (as a percent) |  |  |  |  |  |  |  |  |  |  | 4.50% | 2.90% | 2.20% |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 800,000,000 |
Loss on modification or early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | $ 563,000 |  |  |  |  |  |
Capital expenditure funding capacity |  |  |  |  |  |  | 400,000,000 | $ 350,000,000 |  | 250,000,000 |  |  |  |  |  |  |  |
Minimum liquidity requirement amount |  |  |  |  |  |  | 200,000,000 |  |  | $ 200,000,000 | $ 200,000 |  |  |  |  |  |  |
Repayments of borrowings on revolving credit facility |  |  |  |  |  |  | $ 100,000,000 |  |  |  |  |  |  |  |  |  |  |
Floating rate debt |  |  |  |  |  |  |  |  |  |  | 700,000,000 | 800,000,000 |  |  |  |  |  |
Credit Facility | Unsecured debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured revolving credit facility, maximum borrowing capacity | $ 450,000,000 | $ 586,373,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital expenditure funding capacity | 400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum liquidity requirement amount | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of borrowings on revolving credit facility | $ 136,373,000 | $ 113,627,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Facility | Properties Used to Secure Debt | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total real estate properties, gross |  |  |  |  |  |  |  |  |  |  | $ 1,002,319,000 |  |  |  |  |  |  |
Encumbered properties (property) | property |  |  |  |  |  |  |  |  |  |  | 61 |  |  |  |  |  |  |
Term loan due 2022 | Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000
Loss on modification or early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | 1,477,000 |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate during period |  |  |  |  |  |  |  |  | 2.90% |  |  |  | 2.70% | 3.70% |  |  |  |
Senior Unsecured Notes Due June 2021 | Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on modification or early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | $ 370,000 |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.75% |  |
Principal amount of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  |
Accrued interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,125,000 |  |
Senior Note 4.375 Due 2031 | Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  | 4.375% |  |  |  |  |  |  |  |  |  |
Principal amount of debt |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |
Net proceeds from offering |  |  |  |  |  |  |  | $ 491,357,000 |  |  |  |  |  |  |  |  |  |
Mortgage notes 6.28% maturing July 2022 | Medical Office |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  | 6.28% |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 10,934,000 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes 6.28% maturing July 2022 | Senior Living Communities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  | 5.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 15,273,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Note Due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on modification or early extinguishment of debt |  |  |  |  |  |  |  |  |  |  | $ 29,576,000 |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  | 9.75% |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued interest |  |  |  |  | $ 1,083,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price (as a percent) |  |  |  |  | 104.875% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, amount redeemed |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages 4.85 Percent Matured In October 2022 | Life Science Property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 4.85% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | $ 10,287,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Credit Facility | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis points per annum (as a percent) |  |  |  |  |  |  | 0.15% |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Credit Facility | LIBOR | Unsecured debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis points per annum (as a percent) |  |  |  |  |  |  |  |  |  | 0.30% |  |  |  |  |  |  |  |
Revolving Credit Facility | Credit Facility | LIBOR | Unsecured debt | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis points per annum (as a percent) | 0.40% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of interest payable on debt, including, but not limited to, trade payables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
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- Definition Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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