Fair Value Measurements and Derivative Instruments (Carrying Value and Fair Value of Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 22,845	$ 22,788
Fair value	22,588	22,461
Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	20,437	20,308
Fair value	20,433	20,219
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	2,408	2,480
Fair value	$ 2,155	$ 2,242