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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues:      
Total revenues $ 3,144,097 $ 3,412,190 $ 3,300,303
Cost of revenues: (exclusive of items shown separately below)      
Total cost of revenues 2,137,751 2,387,819 2,305,551
Selling, general and administrative expenses 451,044 484,054 503,747
Accretion of environmental liabilities 11,051 10,136 9,806
Depreciation and amortization 292,915 300,725 298,625
Income from operations 251,336 229,456 182,574
Other (expense) income, net (290) 2,897 (4,510)
Loss on early extinguishment of debt 0 (6,131) (2,488)
(Loss) gain on sale of businesses (3,376) 687 0
Interest expense, net of interest income of $3,462, $4,227 and $2,958, respectively (73,120) (78,670) (81,094)
Income before provision for income taxes 174,550 148,239 94,482
Provision for income taxes 39,713 50,499 28,846
Net income $ 134,837 $ 97,740 $ 65,636
Earnings per share:      
Basic (in dollars per share) $ 2.43 $ 1.75 $ 1.17
Diluted (in dollars per share) $ 2.42 $ 1.74 $ 1.16
Shares used to compute earnings per share — Basic (in shares) 55,479 55,845 56,148
Shares used to compute earnings per share — Diluted (in shares) 55,690 56,129 56,340
Service revenues      
Revenues:      
Total revenues $ 2,724,584 $ 2,842,881 $ 2,709,239
Cost of revenues: (exclusive of items shown separately below)      
Total cost of revenues 1,786,718 1,945,021 1,861,975
Product revenues      
Revenues:      
Total revenues 419,513 569,309 591,064
Cost of revenues: (exclusive of items shown separately below)      
Total cost of revenues $ 351,033 $ 442,798 $ 443,576