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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues $ 845,568 $ 781,461 $ 874,970
Total cost of sales (excluding depreciation and amortization) 419,484 358,917 377,193
Selling, general and administrative 117,184 107,167 105,100
Depreciation and amortization 164,259 178,946 193,138
Long-lived and other asset impairment 21,442 21,397 79,556
Goodwill impairment     99,830
Restructuring charges   2,903 8,450
Interest expense 101,259 108,135 105,716
Debt extinguishment loss     3,971
Gain on sale of assets, net (40,494) (30,258) (10,643)
Other expense (income), net 1,845 (4,707) (1,359)
Income (loss) before income taxes 60,589 38,961 (85,982)
Provision for (benefit from) income taxes 16,293 10,744 (17,537)
Net income (loss) $ 44,296 $ 28,217 $ (68,445)
Basic income (loss) per common share (in dollars per share) $ 0.28 $ 0.18 $ (0.46)
Diluted income (loss) per common share (in dollars per share) $ 0.28 $ 0.18 $ (0.46)
Weighted average common shares outstanding:      
Basic (in shares) 153,281 151,684 150,828
Diluted (in shares) 153,410 151,830 150,828
Contract Operations      
Revenues $ 677,801 $ 648,311 $ 738,918
Total cost of sales (excluding depreciation and amortization) 278,898 244,486 261,087
Aftermarket Services      
Revenues 167,767 133,150 136,052
Total cost of sales (excluding depreciation and amortization) $ 140,586 $ 114,431 $ 116,106