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Indebtedness - Additional Information (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Jul. 07, 2021 | Dec. 31, 2020 | Oct. 31, 2017
2021 Unsecured Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maturity Date |  | Jul. 07, 2026 |  |  |
2015 Unsecured Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maturity Date |  | Sep. 12, 2022 |  |  |
Unsecured Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized Debt Issuance Costs |  | $ 4,897 |  | $ 1,049 |
Line of Credit Facility, Current Borrowing Capacity |  |  | $ 750,000 |  | $ 725,000
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 1,000,000 |  |
Maturity Date | [1] | Jul. 07, 2025 |  |  |
Mortgage Loans Payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Unamortized Debt Issuance Costs |  | $ 126 |  | $ 335 |
Extinguishment of Debt, Amount |  | 57,912 |  |  |
Net carrying value of industrial properties collateralized by mortgage loans |  | $ 136,284 |  |  |
2021 Unsecured Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Derivative, Notional Amount |  |  | 200,000 |  |
Term Loan Borrowing Capacity |  |  | 460,000 |  |
2015 Unsecured Term Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Term Loan Borrowing Capacity |  |  | $ 360,000 |  |
[1] | Amounts exclude unamortized debt issuance costs of $4,897 and $1,049 as of September 30, 2021 and December 31, 2020, respectively, which are included in the line item Prepaid Expenses and Other Assets, Net.

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