Exit and Termination Costs (Tables)

6 Months Ended

Jun. 30, 2021

Restructuring And Related Activities [Abstract]

Summary of Exit and Termination Costs

The following summarizes our exit and termination costs for the three and six months ended June 30, 2021 and 2020 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Severance costs	$	—		$	(148	)	$	509		$	1,447
Transportation contract capacity releases (including    accretion of discount)		184			10,445			394			10,445
Divestiture contract obligation (including accretion of    discount)		(16,130	)		—			(3,135	)		—
	$	(15,946	)	$	10,297		$	(2,232	)	$	11,892

Exit and Termination Costs Included in Accrued Liabilities in Consolidated Balance Sheet

The following details the accrued exit and termination cost liability activity for the six months ended June 30, 2021 (in thousands):

	Exit Costs (1)			Termination Costs
Balance at December 31, 2020	$	493,543		$	1,454
Accrued severance costs		—			509
Accretion of discount		25,424			—
Divestiture contract obligation - changes in estimate		(28,165	)		—
Payments		(46,321	)		(1,594	)
Balance at June 30, 2021	$	444,481		$	369

(1) Includes the divestiture contract obligation and the transportation contract capacity release obligation.