Fair Value Measurements Fair Value of Financial Instrument Assumptions (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026	Oct. 21, 2025
Revolving Credit Facility [Member]
Fair Value of Financial Instrument Assumptions [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 900.0	$ 900.0
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,050.0	$ 1,050.0
Line of Credit Facility, Initiation Date		Jul. 18, 2013
Basis point spread on variable rate under Credit Facility	1.50%	1.50%
JPM Master Repurchase Agreement Initiation Date
Fair Value of Financial Instrument Assumptions [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 300.0	$ 300.0	$ 100.0
Line of Credit Facility, Initiation Date	Oct. 21, 2025
JPM Mortgage Repurchase Agreement
Fair Value of Financial Instrument Assumptions [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 200.0
Line of Credit Facility, Initiation Date	Oct. 24, 2023