Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Equity securities	$ 17,696	$ 18,663
Fair Value, Inputs, Level 1 | Reported Value Measurement
Segment Reporting Information [Line Items]
Equity securities	4,200	6,300
Fair Value, Inputs, Level 1 | Reported Value Measurement | Bellaire
Segment Reporting Information [Line Items]
Equity securities	$ 13,500	$ 12,300
Bellaire
Segment Reporting Information [Line Items]
Initial investment amount			$ 5,000