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Notes Payable and Unsecured Credit Facilities Narrative (Details) - USD ($) $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Feb. 09, 2021 | Jan. 31, 2021 | Jun. 30, 2021
Debt Instrument [Line Items] |  |  |
Line Of Credit Facility Maximum Borrowing Capacity |  |  | $ 1,200.0
Long-term Debt, Maturity Date | Mar. 23, 2025 |  |
Repayments of loan |  | $ 265.0 |
Cash paid relating to interest rate swap | $ 2.5 |  |
Accordion Feature |  |  |
Debt Instrument [Line Items] |  |  |
Line Of Credit Facility Maximum Borrowing Capacity | 1,250.0 |  |
Swing Loan |  |  |
Debt Instrument [Line Items] |  |  |
Line Of Credit Facility Maximum Borrowing Capacity | 125.0 |  |
Letter of Credit |  |  |
Debt Instrument [Line Items] |  |  |
Line Of Credit Facility Maximum Borrowing Capacity | $ 50.0 |  |

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