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SECURED AND UNSECURED DEBT, NET - Credit Facilities (Details) $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) loan | Dec. 31, 2020 USD ($) | Nov. 30, 2020 instrument
Unsecured Debt |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Basis points added to to variable rate | 90.00% |  |
Revolving Credit Facility |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Total revolving credit facility | $ 1,100,000 |  |
Potential maximum available | $ 2,000,000 |  |
Number of Extensions of loan | loan | 2 |  |
Extension period of option on loan | 6 months |  |
Revolving credit facility due 2023 | Letter of Credit |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Borrowings outstanding at end of year | $ 2,600 | $ 2,800 |
Revolving credit facility due 2023 | Unsecured Debt |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Commitment fee | 0.15% |  |
Basis points added to to variable rate | 0.825% |  |
Revolving credit facility due 2023 | Unsecured Debt | Minimum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Commitment fee | 0.10% |  |
Basis points added to to variable rate | 0.75% |  |
Revolving credit facility due 2023 | Unsecured Debt | Maximum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Commitment fee | 0.30% |  |
Basis points added to to variable rate | 1.45% |  |
Revolving credit facility due 2023 | Revolving Credit Facility |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Total revolving credit facility | $ 1,100,000 | 1,100,000 |
Weighted average daily borrowings during the year ended |  | 42,186 |
Maximum daily borrowings during the year ended |  | $ 375,000 |
Weighted average interest rate during the year ended |  | 1.40% |
Term Loan due September 2023 |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Total revolving credit facility | $ 350,000 |  |
Term Loan due September 2023 | Unsecured Debt |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Number of interest rate swaps | instrument |  |  | 3
All-in weighted average interest rate |  |  | 1.07%
Term Loan due September 2023 | Unsecured Debt | Minimum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Basis points added to to variable rate | 0.80% |  |
Term Loan due September 2023 | Unsecured Debt | Maximum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Basis points added to to variable rate | 1.65% |  |
Working Capital Credit Facility | Variable Rate Debt | Unsecured Debt |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Total revolving credit facility | $ 75,000 | $ 75,000 |
Borrowings outstanding at end of year | 27,318 | 28,024 |
Weighted average daily borrowings during the year ended | 8,839 | 20,132 |
Maximum daily borrowings during the year ended | $ 39,503 | $ 54,974 |
Weighted average interest rate during the year ended | 0.90% | 1.40% |
Interest rate at end of the period | 0.90% | 1.00% |
Basis points added to to variable rate | 0.825% |  |
Working Capital Credit Facility | Variable Rate Debt | Unsecured Debt | Minimum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Basis points added to to variable rate | 0.75% |  |
Working Capital Credit Facility | Variable Rate Debt | Unsecured Debt | Maximum |  |  |
Summary of short-term bank borrowings under unsecured commercial bank credit facility |  |  |
Basis points added to to variable rate | 1.45% |  |

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- Definition Maximum borrowing capacity the credit facility could be adjusted to per agreement. + References No definition available. + 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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