Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Revenues $ 109,675 $ 98,271
Expenses:    
Operating expenses 91,534 85,814
Depreciation and amortization 28,549 32,202
Total expenses 120,083 118,016
Total operating gross margin (loss) (10,408) (19,745)
General and administrative expense (6,201) (7,040)
Gain (loss) on disposition of assets, net 343 (352)
Total operating income (loss) (16,266) (27,137)
Other income (expense):    
Interest expense (11,240) (10,870)
Interest income 23 10
Other 291 530
Total other income (expense) (10,926) (10,330)
Income (loss) before income taxes (27,192) (37,467)
Income tax expense (benefit) 1,604 2,342
Net income (loss) (28,796) (39,809)
Less: Mandatory convertible preferred stock dividend 906 0
Net income (loss) available to common stockholders $ (29,702) $ (39,809)
Basic earnings (loss) per common share (in dollars per share) $ (0.21) $ (0.31)
Diluted earnings (loss) per common share (in dollars per share) $ (0.21) $ (0.31)
Number of common shares used in computing earnings per share:    
Basic (in shares) 138,765,995 130,142,527
Diluted (in shares) 138,765,995 130,142,527