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v3.20.4

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement [Abstract] |  |  |
Revenues | $ 1,427,412 | $ 1,126,278 | $ 1,037,667
Cost of revenues | (1,236,043) | (1,018,484) | (927,335)
Gross profit | 191,369 | 107,794 | 110,332
General and administrative expense | (71,415) | (49,200) | (48,220)
Intangible asset amortization | (11,436) | (4,695) | (2,400)
Acquisition related costs | (1,026) | (4,311) | 0
Other operating expense, net | (12,600) | (11,837) | (17,101)
Operating income | 94,892 | 37,751 | 42,611
Interest income | 161 | 1,142 | 1,017
Interest expense | (29,377) | (16,686) | (12,350)
Loss on extinguishment of debt | (301) | (7,728) | 0
Income before income taxes | 65,375 | 14,479 | 31,278
Income tax (expense) benefit | (22,471) | 26,216 | (1,738)
Net income | 42,904 | 40,695 | 29,540
Less: Net income attributable to noncontrolling interests | (598) | (794) | (4,353)
Net income attributable to Sterling common stockholders | $ 42,306 | $ 39,901 | $ 25,187
Net income per share attributable to Sterling common stockholders: |  |  |
Basic (in dollars per share) | $ 1.52 | $ 1.50 | $ 0.94
Diluted (in dollars per share) | $ 1.50 | $ 1.47 | $ 0.93
Weighted average common shares outstanding: |  |  |
Basic (in shares) | 27,859 | 26,671 | 26,903
Diluted (in shares) | 28,195 | 27,119 | 27,194

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