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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from continuing operating activities      
Net income (loss) $ 112,168 $ (34,765) $ 19,634
Adjustments to reconcile net income (loss) to net cash provided (used) by continuing operating activities:      
Income from discontinued operations, net of taxes (200,301) (11,381) (14,547)
Deferred income taxes (42,013) (27,436) 5,376
Loss on extinguishment of debt 8,703    
Gain on property insurance recovery associated with property, plant and equipment     (5,147)
Impairments of long-lived assets and goodwill 1,621 43,188  
Depreciation, depletion and amortization of property, plant and equipment 59,354 35,930 30,987
Amortization 4,932 3,172 1,947
Stock-based compensation 3,992 1,639 785
Other 1,835 (259) 1,268
Cash provided (used) by changes in assets and liabilities (net of effects of discontinued operations):      
Accounts receivable (6) 3,677 (8,218)
Inventories 1,372 (468) (993)
Prepaid insurance (2,296) 2,500 1,697
Prepaid and accrued income taxes 5,619 576 3,505
Other supplies, prepaid items and other 167 (3,717) (20)
Accounts payable 16,632 (10,825) 1,154
Accrued interest (2,305) (709) (37)
Customer deposits 376 (3,433) 236
Other current and noncurrent liabilities 7,963 (2,799) 1,033
Net cash provided (used) by continuing operating activities (22,187) (5,110) 38,660
Cash flows from continuing investing activities      
Expenditures for property, plant and equipment (212,543) (438,944) (217,485)
Net proceeds from sale of discontinued operations 356,704    
Proceeds from property insurance recovery associated with property, plant and equipment     5,147
Software and software development costs   (423) (2,801)
Proceeds from sales of property and equipment 5,259 87 569
Proceeds from short-term investments   39,500 14,500
Purchases of short-term investments   (25,000) (29,000)
Proceeds from current and noncurrent restricted cash and cash equivalents 186,935 45,969 200,111
Deposits of current and noncurrent restricted cash and cash equivalents (186,935)   (165,471)
Proceeds from noncurrent restricted investments   25,000 259,990
Purchases of noncurrent restricted investments     (75,000)
Other investing activities 3,877 3,132 25
Net cash provided (used) by continuing investing activities 153,297 (350,679) (9,415)
Cash flows from continuing financing activities      
Proceeds from revolving debt facility 76,516 47,438  
Payments on revolving debt facility (76,516) (47,438)  
Payments on senior secured notes (100,000)    
Proceeds from other long-term debt, net of fees 14,751 31,047  
Payments on other long-term debt (15,402) (12,923) (10,439)
Payments of debt modification and issuance costs (7,332) (1,200)  
Payments of debt extinguishment costs (4,938)    
Proceeds from loans secured by cash value of life insurance policies   1,288  
Proceeds from short-term financing 11,161 10,273 12,965
Payments on short-term financing (11,392) (12,399) (14,996)
Proceeds from issuance of redeemable preferred stocks, net of discount and fees   180,013  
Redemption of preferred stock (71,966)    
Proceeds from issuance of common stock warrants, net of discount and fees   21,018  
Payments of issuance costs relating to preferred stocks and warrants (785) (2,472)  
Proceeds from exercises of stock options 371 1,785 1,074
Excess income tax benefit associated with stock-based compensation   330  
Dividends paid on preferred stocks (8,028) (300) (300)
Net cash provided (used) by continuing financing activities (193,560) 264,349 (11,696)
Cash flows of discontinued operations:      
Net cash provided (used) by operating activities (1,697) 38,313 26,377
Net cash used by investing activities (1,025) (3,382) (2,442)
Net cash provided (used) by financing activities (2,006) (1,292) 206
Net cash provided (used) by discontinued operations (4,728) 33,639 24,141
Net increase (decrease) in cash and cash equivalents (67,178) (57,801) 41,690
Cash and cash equivalents at beginning of year 127,195 184,996 143,306
Cash and cash equivalents at end of year $ 60,017 127,195 $ 184,996
12% Senior Secured Notes [Member]      
Cash flows from continuing financing activities      
Proceeds from senior secured notes, net of pay off of secured term loan, discount and fees   $ 47,889