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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash flows from continuing operating activities    
Net loss $ (59,181) $ (30,131)
Adjustments to reconcile net loss to net cash provided by continuing operating activities:    
Deferred income taxes 1,015 (10,702)
Loss on extinguishment of debt 5,951  
Depreciation, depletion and amortization of property, plant and equipment 53,514 50,341
Amortization of intangible and other assets 1,787 1,538
Loss (gain) on sales of a business and other property and equipment (1,924) 4,366
Other 7,075 3,912
Cash provided (used) by changes in assets and liabilities (net of effects of discontinued operations):    
Accounts receivable 6,308 1,687
Inventories 4,599 3,282
Prepaid insurance 8,878 9,611
Prepaid and accrued income taxes 1,122 (1,009)
Accounts payable 5,023 (3,580)
Accrued interest 3,298 (7,977)
Other assets and other liabilities 1,315 (2,009)
Net cash provided by continuing operating activities 38,780 19,329
Cash flows from continuing investing activities    
Expenditures for property, plant and equipment (27,187) (25,172)
Net proceeds from sale of businesses and other property and equipment 6,654 22,561
Proceeds from property insurance recovery associated with property, plant and equipment 1,531  
Net proceeds from sale of discontinued operations 2,730  
Other investing activities 112 415
Net cash used by continuing investing activities (16,160) (2,196)
Cash flows from continuing financing activities    
Proceeds from 9.625% senior secured notes, net of discount and fees 390,473  
Payments on senior secured notes (375,000)  
Payments on other long-term debt (7,593) (12,413)
Payments of debt-related costs (10,845) (90)
Payments on short-term financing, net (7,621) (9,145)
Payments of preferred stock modification costs (2,677)  
Taxes paid on equity awards (230) (66)
Net cash used by continuing financing activities (13,493) (21,714)
Cash flows of discontinued operations:    
Net cash used by operating activities 0 (2,171)
Net cash used by financing activities 0 (200)
Net cash used by discontinued operations 0 (2,371)
Net increase (decrease) in cash and cash equivalents 9,127 (6,952)
Cash and cash equivalents at beginning of period 33,619 60,017
Cash and cash equivalents at end of period $ 42,746 $ 53,065