Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENT OF OPERATIONS

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CONSOLIDATED STATEMENT OF OPERATIONS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Statement [Abstract]      
Revenues $ 442,520 $ 427,004 $ 712,183
Expenses:      
Operating expenses 355,487 362,521 526,290
Depreciation and amortization 122,373 139,795 156,194
Total expenses 477,860 502,316 682,484
Total operating gross margin (loss) (35,340) (75,312) 29,699
General and administration expense (25,676) (34,332) (36,190)
Provision for reduction in carrying value of certain assets (1,938) 0 (12,490)
Gain (loss) on disposition of assets, net (2,851) (1,613) 1,643
Total operating income (loss) (65,805) (111,257) (17,338)
Other income (expense):      
Interest expense (44,226) (45,812) (45,155)
Interest income 244 58 269
Other 126 367 (9,747)
Total other income (expense) (43,856) (45,387) (54,633)
Income (loss) before income taxes (109,661) (156,644) (71,971)
Current tax expense (benefit) 9,264 5,108 19,604
Deferred tax expense (benefit) (224) 69,062 2,709
Total income tax expense (benefit) 9,040 74,170 22,313
Net income (loss) (118,701) (230,814) (94,284)
Less: Net income attributable to noncontrolling interest 0 0 789
Net income (loss) attributable to controlling interest (118,701) (230,814) (95,073)
Less: Mandatory convertible preferred stock dividend 3,051 0 0
Net income (loss) available to common stockholders $ (121,752) $ (230,814) $ (95,073)
Basic earnings (loss) per share (in dollars per share) $ (0.89) $ (1.86) $ (0.78)
Diluted earnings (loss) per share (in dollars per share) $ (0.89) $ (1.86) $ (0.78)
Number of common shares used in computing earnings per share:      
Basic (in shares) 136,266,843 124,130,004 122,562,187
Diluted (in shares) 136,266,843 124,130,004 122,562,187