Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (268,175)	$ (181,898)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	52,537	114,657
Goodwill and other long-lived asset impairments	112,164	35,801
Inventory write-downs	5,281	10,607
Gain on derivative	(4,866)	0
Accretion of asset retirement obligation	1,924	1,051
Provision for expected credit losses, net of recoveries	10,268	4,686
Amortization of debt discounts and debt issuance costs	8,845	3,392
Stock-based compensation	1,532	8,714
Loss (gain) on disposal of assets	(3,503)	4,013
Deferred income taxes	(119)	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	67,750	40,455
Inventories	6,921	6,529
Prepaid expenses and other assets	(1,415)	7,483
Accounts payable	(4,806)	(36,371)
Accrued expenses	3,734	11
Other liabilities	(8,301)	1,057
Net cash (used in) provided by operating activities	(20,229)	20,187
Cash flows from investing activities:
Capital expenditures	(7,825)	(55,353)
Proceeds from sale of assets	57,384	17,297
Payments to acquire business, net of cash acquired	(59,350)	0
Payments for other long-term assets	0	(1,260)
Net cash used in investing activities	(9,791)	(39,316)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	53,000	0
Repayments of long-term debt	(46,952)	(29,364)
Repurchases of common stock	(15)	(5,121)
Payments of debt issuance costs	(720)	(469)
Other financing activities	(1,525)	0
Net cash provided by (used in) financing activities	3,788	(34,954)
Net decrease in cash, cash equivalents, and restricted cash	(26,232)	(54,083)
Cash and cash equivalents; beginning of period	36,217	90,300
Cash, cash equivalents and restricted cash; end of period	9,985	36,217
Supplemental cash flow information and non-cash investing and financing activities:
Interest paid	37,322	39,248
Income taxes paid, net of refunds	0	(1,872)
Operating lease liabilities incurred from obtaining right-of-use assets	5,661	14,541
Finance lease liabilities incurred from obtaining right-of-use assets	1,553	7,941
Capital expenditures included in accounts payable	(620)	(2,806)
Issuance of Series A Participating Preferred Stock	22,000	0
Recognition of derivative liability	9,713	0
Other non-cash change in asset retirement obligations	$ (9)	$ 7,362