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v3.22.0.1

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Statement [Abstract] |  |  |
Revenues | $ 1,581,766 | $ 1,427,412 | $ 1,126,278
Cost of revenues | (1,367,009) | (1,236,043) | (1,018,484)
Gross profit | 214,757 | 191,369 | 107,794
General and administrative expense | (78,506) | (71,415) | (49,200)
Intangible asset amortization | (11,464) | (11,436) | (4,695)
Acquisition related costs | (3,877) | (1,026) | (4,311)
Other operating expense, net | (13,623) | (12,600) | (11,837)
Operating income | 107,287 | 94,892 | 37,751
Interest income | 52 | 161 | 1,142
Interest expense | (19,348) | (29,377) | (16,686)
Gain (loss) on extinguishment of debt, net | 2,032 | (301) | (7,728)
Income before income taxes | 90,023 | 65,375 | 14,479
Income tax (expense) benefit | (24,900) | (22,471) | 26,216
Net income | 65,123 | 42,904 | 40,695
Less: Net income attributable to noncontrolling interests | (2,478) | (598) | (794)
Net income attributable to Sterling common stockholders | $ 62,645 | $ 42,306 | $ 39,901
Net income per share attributable to Sterling common stockholders: |  |  |
Basic (in dollars per share) | $ 2.19 | $ 1.52 | $ 1.50
Diluted (in dollars per share) | $ 2.15 | $ 1.50 | $ 1.47
Weighted average common shares outstanding: |  |  |
Basic (in shares) | 28,600 | 27,859 | 26,671
Diluted (in shares) | 29,101 | 28,195 | 27,119

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