Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (63,904)	$ (49,011)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	90,884	93,554
Allowance for doubtful accounts, net of recoveries	(79)	271
Write-off of obsolete inventory	570	0
Gain on dispositions of property and equipment, net	(4,513)	(3,121)
Stock-based compensation expense	2,770	4,443
Phantom stock compensation expense	(112)	47
Amortization of debt issuance costs and discount	3,147	2,900
Impairment	2,667	4,422
Deferred income taxes	(10,811)	538
Change in other noncurrent assets	3,122	565
Change in other noncurrent liabilities	(4,328)	(426)
Changes in current assets and liabilities:
Receivables	7,062	(8,644)
Inventory	(4,088)	(4,841)
Prepaid expenses and other current assets	(809)	(1,140)
Accounts payable	3,638	(1,272)
Deferred revenues	(383)	420
Accrued expenses	(12,811)	950
Net cash provided by operating activities	12,022	39,655
Cash flows from investing activities:
Purchases of property and equipment	(50,046)	(67,148)
Proceeds from sale of property and equipment	7,733	5,864
Proceeds from insurance recoveries	1,469	1,082
Net cash used in investing activities	(40,844)	(60,202)
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	(28,947)	(21,084)
Beginning cash, cash equivalents, and restricted cash	54,564	75,648
Ending cash, cash equivalents, and restricted cash	25,617	54,564
Supplementary disclosure:
Interest Paid	37,342	36,624
Income tax paid	3,964	3,556
Change in capital expenditure accruals	$ (5,217)	$ 5,706