Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (184,244)	$ (26,787)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	161,081	141,362
Amortization of deferred financing fees	1,207	500
(Gain) loss on disposal of assets	(8,915)	151
Loss on impairment of assets	34,327	0
Unrealized loss on derivative recognized in other comprehensive loss	(5,615)	(6,544)
Gain on financial instrument and derivatives, net	(1,390)	(444)
Stock-based compensation	16,403	9,637
Other non-cash expense, net	0	8
Changes in operating assets and liabilities:
Decrease in trade and other accounts receivable, net	224,349	11,600
Decrease in inventories	12,804	9,048
Decrease (increase) in prepaid and other current assets	3,508	(257)
Decrease (increase) in other assets	14,393	(46,950)
Increase (decrease) in accounts payable	(77,685)	23,511
Decrease in accrued expenses	(73,555)	(27,141)
Increase (decrease) in customer contract liabilities	(60)	411
Increase (decrease) in other liabilities	(6,194)	53,820
Net cash provided by operating activities	110,414	141,925
Cash flows from investing activities:
Proceeds from sale of business	53,259	0
Purchase of property and equipment	(83,719)	(111,694)
Advances of deposit on equipment	(1,118)	(2,319)
Implementation of software	(5,689)	(1,783)
Proceeds from disposal of assets	14,890	18,348
Proceeds from insurance recoveries	58	106
Net cash used in investing activities	(22,319)	(97,342)
Cash flows from financing activities:
Proceeds from asset-based revolver	175,000	0
Payments on the term loan facility and asset-based revolver	(176,750)	(1,750)
Payments on finance leases	(3,022)	(2,553)
Shares repurchased and retired related to stock-based compensation	(1,944)	(3,365)
Net cash used financing activities	(6,716)	(7,668)
Non-cash effect of foreign translation adjustments	753	(29)
Net increase in cash, cash equivalents	82,132	36,886
Cash and cash equivalents, beginning	255,015	80,206
Cash and cash equivalents, ending	337,147	117,092
Supplemental disclosure of cash flow information:
Interest expense, net	12,347	10,847
Income taxes	6	1,500
Non-cash investing and financing activities:
Change in accrued capital expenditures	6,350	(10,299)
Non-cash additions to finance right-of-use assets	0	5,084
Non-cash additions to finance lease liabilities, including current maturities	0	5,087
Non-cash additions to operating right-of-use assets	8,200	61,670
Non-cash additions to operating lease liabilities, including current maturities	$ 8,161	$ 61,454