Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss)	$ 31,598	$ 95,632	$ (74,235)	$ 255,584
Other Comprehensive Income:
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($109), ($111), ($327), ($332))	378	385	1,134	1,155
Unrealized Gain on Investments in Available-for-Sale Securities (Net of tax: ($117), ($69), ($164), ($28))	406	238	569	95
Other Comprehensive Income	784	623	1,703	1,250
Comprehensive Income (Loss)	$ 32,382	$ 96,255	$ (72,532)	$ 256,834