Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (71,756)	$ (21,806)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	85,821	71,476
Amortization of deferred financing fees	551	236
(Gain) loss on disposal of assets	(7,962)	481
Loss on impairment of assets	34,327	0
Unrealized loss on derivative	(2,961)	(2,862)
Realized (gain) loss on derivative	341	(248)
Stock-based compensation	6,880	4,000
Other non-cash expense, net	0	8
Changes in operating assets and liabilities:
Decrease (increase) in trade and other accounts receivable, net	(30,833)	15,136
Decrease in inventories	5,647	4,710
Decrease in prepaid and other current assets	4,888	1,990
Decrease (increase) in other assets	4,958	(51,435)
Increase in accounts payable	27,694	8,897
Decrease in accrued expenses	(8,478)	(27,294)
Increase in customer contract liabilities	2,940	0
Increase (decrease) in other liabilities	(3,570)	55,100
Net cash provided by operating activities	48,487	58,389
Cash flows from investing activities:
Proceeds from sale of business	53,259	0
Purchase of property and equipment	(40,798)	(56,865)
Advances of deposit on equipment	(1,775)	(1,775)
Implementation of software	(2,600)	(743)
Proceeds from disposal of assets	5,973	9,659
Proceeds from insurance recoveries	58	38
Net cash provided (used) in investing activities	14,117	(49,686)
Cash flows from financing activities:
Proceeds from asset-based revolver	175,000	0
Payments on the secured notes and term loan facility	(875)	(875)
Payments on finance leases	(2,278)	(1,396)
Shares repurchased and retired related to stock-based compensation	(1,151)	(2,861)
Net cash provided (used) in financing activities	170,696	(5,132)
Non-cash effect of foreign translation adjustments	1,107	(29)
Net increase in cash, cash equivalents	234,407	3,542
Cash and cash equivalents, beginning	255,015	80,206
Cash and cash equivalents, ending	489,422	83,748
Supplemental disclosure of cash flow information:
Interest expense, net	5,724	5,324
Income taxes	2	0
Non-cash investing and financing activities:
Change in accrued capital expenditures	29,900	(8,635)
Non-cash additions to finance right-of-use assets	0	6,029
Non-cash additions to finance lease liabilities, including current maturities	0	6,164
Non-cash additions to operating right-of-use assets	1,970	62,698
Non-cash additions to operating lease liabilities, including current maturities	$ (1,970)	$ 62,444