Exit Costs - Exit Costs Included in Accrued Liabilities in Consolidated Balance Sheet - (Detail) - Exit Costs $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	[1]
Exit costs included in accrued liabilities in consolidated balance sheet
Balance at December 31, 2022	$ 395,680
Accretion of discount	10,323
Changes in estimate	2,000
Payments	(28,487)
Balance at March 31, 2023	$ 379,516

[1] Includes the divestiture contract obligation and the transportation contract capacity release obligation.