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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