Exit and Termination Costs (Tables)

3 Months Ended

Mar. 31, 2021

Restructuring And Related Activities [Abstract]

Summary of Exit and Termination Costs

The following summarizes our exit and termination costs for the three months ended March 31, 2021 and 2020 (in thousands):

	Three Months Ended March 31,
	2021		2020
Severance costs	$	509	$	1,595
Transportation contract capacity releases (including accretion of    discount)		210		—
Divestiture contract obligation (including accretion of discount)		12,995		—
	$	13,714	$	1,595

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 three months ended March 31, 2021 (in thousands):

	Exit Costs (1)			Termination Costs
Balance at December 31, 2020	$	493,543		$	1,454
Accrued severance costs		—			509
Accretion of discount		13,205			—
Payments		(25,848	)		(1,432	)
Balance at March 31, 2021	$	480,900		$	531

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