Borrowings Under Credit Facilities and Commercial Paper Program - Unsecured Revolving Credit Facility (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	[1]
Debt Disclosure [Abstract]
Balance outstanding at quarter end	$ 0	$ 0	$ 0
Gross borrowings	250	0
Gross repayments	(250)	0
Maximum amount outstanding at any month end	0	0
Average amount outstanding (total of daily principal balances divided by days in period)	$ 3	$ 0
Weighted average interest rate (actual interest expense divided by average borrowings outstanding)	3.95%	0.00%

[1] The consolidated balance sheet at December 31, 2025 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.