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Debt - Narrative (Details) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 21, 2018 USD ($) derivative_instrument | Dec. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Mortgages Payable [Line Items] |  |  |  |
Debt, net |  | $ 555,109,000 | $ 555,109,000 | $ 572,850,000
Repayment of mortgages payable |  |  | 67,349,000 |
Revolving Credit Facility, Amended and Restated |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Repaid amount |  | 100,000,000 |  |
Mortgages |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Long-term debt, net |  | $ 106,728,000 | $ 106,728,000 | $ 175,321,000
Weighted average interest rate (percent) |  | 4.07% | 4.07% | 4.34%
Mortgages | Minimum |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Stated interest rate |  | 3.49% | 3.49% | 3.49%
Mortgages | Maximum |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Stated interest rate |  | 4.58% | 4.58% | 5.49%
Revolving line of credit | Revolving Credit Facility, Amended and Restated |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Debt, net |  | $ 50,000,000 | $ 50,000,000 |
Maximum borrowing capacity | $ 350,000,000 | 50,000,000 | 50,000,000 | $ 50,000,000
Proceeds from lines of credit |  |  | $ 150,000,000 |
Debt instrument, term | 4 years |  |  |
Number of extension options | derivative_instrument | 2 |  |  |
Extension option | 6 months |  |  |
Interest rate (percentage) |  |  | 1.19% | 1.19%
Long-term line of credit |  | 0 | $ 0 | $ 0
Outstanding borrowings |  | 300,000,000 | $ 300,000,000 |
Leverage ratio, fee percentage |  |  | 0.15% |
Revolving line of credit | Revolving Credit Facility, Amended and Restated | Carrying Value |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Line of credit and term loan, estimated fair value |  | 50,000,000 | $ 50,000,000 | 0
Revolving line of credit | Revolving Credit Facility, Amended and Restated | London Interbank Offered Rate (LIBOR) |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Basis spread on variable rate (percent) |  |  | 1.05% |
Unsecured Debt | Term Loan |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Long-term debt, net |  | 398,381,000 | $ 398,381,000 | 397,529,000
Debt instrument, face amount | $ 400,000,000 |  |  |
Number of tranches | derivative_instrument | 2 |  |  |
Unsecured Debt | Term Loan | Carrying Value |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Line of credit and term loan, estimated fair value |  | $ 400,000,000 | $ 400,000,000 | $ 400,000,000
Unsecured Debt | Term Loan, Tranche One |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Debt instrument, term | 5 years |  |  |
Debt instrument, face amount | $ 250,000,000 |  |  |
Unsecured Debt | Term Loan, Tranche Two |  |  |  |
Mortgages Payable [Line Items] |  |  |  |
Debt instrument, term | 5 years 6 months |  |  |
Debt instrument, face amount | $ 150,000,000 |  |  |

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- Definition Amount of short-term and long-term debt and lease obligation. + 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 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=120398452&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 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt 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(a)(1)) -URI http://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 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 http://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 http://asc.fasb.org/extlink&oid=120398452&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 http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition The effective interest rate during 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 http://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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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 http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: 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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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