Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net loss	$ (54,075)	$ (34,524)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	68,428	70,535
Allowance for doubtful accounts, net of recoveries	(90)	(311)
Write-off of obsolete inventory	502	0
Gain on dispositions of property and equipment, net	(2,184)	(2,922)
Stock-based compensation expense	2,013	3,395
Phantom stock compensation expense	(99)	2,808
Amortization of debt issuance costs and discount	2,335	2,153
Impairment	1,378	2,607
Deferred income taxes	1,020	189
Change in other noncurrent assets	3,125	541
Change in other noncurrent liabilities	(4,163)	(735)
Changes in current assets and liabilities:
Receivables	(2,126)	(16,549)
Inventory	(3,652)	(4,934)
Prepaid expenses and other current assets	30	329
Accounts payable	2,346	1,527
Deferred revenues	(106)	(173)
Accrued expenses	(6,044)	(2,446)
Net cash provided by operating activities	8,638	21,490
Cash flows from investing activities:
Purchases of property and equipment	(40,543)	(48,778)
Proceeds from sale of property and equipment	4,778	4,665
Proceeds from insurance recoveries	641	980
Net cash used in investing activities	(35,124)	(43,133)
Cash flows from financing activities:
Proceeds from exercise of options	0	12
Purchase of treasury stock	(125)	(549)
Net cash used in financing activities	(125)	(537)
Net decrease in cash, cash equivalents and restricted cash	(26,611)	(22,180)
Beginning cash, cash equivalents, and restricted cash	54,564	75,648
Ending cash, cash equivalents, and restricted cash	27,953	53,468
Supplementary disclosure:
Interest Paid	32,773	31,872
Income tax paid	3,103	2,739
Change in capital expenditure accruals	$ (4,267)	$ 3,564