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Summary of Significant Accounting Policies (Narrative) (Details) | 6 Months Ended |
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Jun. 30, 2026 USD ($) segment | Dec. 31, 2025 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |
Number of reportable segments | segment | 1 |
Monthly Fee to Participate in our Portfolio Program | $ 599 |
Cash and Cash Equivalents [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Uninsured cash and cash equivalents | 1,000,000.0 | $ 22,300,000
Restricted Cash and Cash Equivalents [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Uninsured cash and cash equivalents | $ 486,700,000 | $ 473,600,000

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