Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Assets and liabilities measured at fair value on a recurring basis
Commodity derivatives, net	$ 89,012	$ 90,051	$ 116,349
Provisionally priced contracts	(27,614)	(57,220)	(116,885)
Convertible preferred securities	14,190	14,190	15,625
Other assets and liabilities	27,406	31,894	38,385
Total	102,994	78,915	53,474
Level 1
Assets and liabilities measured at fair value on a recurring basis
Commodity derivatives, net	48,761	47,721	48,750
Provisionally priced contracts	(8,408)	(12,203)	(86,176)
Convertible preferred securities	0	0	0
Other assets and liabilities	5,053	2,711	5,525
Total	45,406	38,229	(31,901)
Level 2
Assets and liabilities measured at fair value on a recurring basis
Commodity derivatives, net	40,251	42,330	67,599
Provisionally priced contracts	(19,206)	(45,017)	(30,709)
Convertible preferred securities	0	0	0
Other assets and liabilities	22,353	29,183	32,860
Total	43,398	26,496	69,750
Level 3
Assets and liabilities measured at fair value on a recurring basis
Commodity derivatives, net	0	0	0
Provisionally priced contracts	0	0	0
Convertible preferred securities	14,190	14,190	15,625
Other assets and liabilities	0	0	0
Total	$ 14,190	$ 14,190	$ 15,625