Asset Impairments, Other Charges, and Inventory Valuation Provision (Tables)

12 Months Ended

Dec. 31, 2019

Restructuring and Related Activities [Abstract]

Schedule of restructuring and impairment charges

The following table summarizes these charges (in thousands):

	Year Ended
	December 31, 2017
Workforce reduction and related charges	$	3,057
CEC asset impairments		32,274
Station closures and related charges		25,557
LCFS Credits charge		7,046
Total asset impairments and other charges		67,934
Inventory valuation provision		13,158
Total charges	$	81,092

The following table summarizes the charges related to the foregoing that have been or will be settled with cash payments and their related liability balances as of December 31, 2018 and 2019 (in thousands):

			Cash Payments			Cash Payments				Cash Payments
			Made in the			Made in the				Made in the
			Year Ended	Balance as of		Year Ended		Balance as of		Year Ended		Balance as of
	Charges		December 31, 2017	December 31, 2017		December 31, 2018		December 31, 2018		December 31, 2019		December 31, 2019
Employee severance	$	2,757	(2,757)	$	—	$	—	$	—	$	—	$	—
Lease termination fees and AROs for station closures		4,083	(70)		4,013		(1,810)		2,203		(249)		1,954
	$	6,840	(2,827)	$	4,013	$	(1,810)	$	2,203	$	(249)	$	1,954