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Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Income Statement [Abstract]    
Revenues $ 440,360 $ 403,579
Cost of revenues (363,456) (341,837)
Gross profit 76,904 61,742
General and administrative expense (27,298) (23,321)
Intangible asset amortization (4,297) (3,736)
Acquisition related costs (36) (190)
Other operating expense, net (3,148) (1,868)
Operating income 42,125 32,627
Interest income 5,902 1,974
Interest expense (6,664) (7,528)
Income before income taxes 41,363 27,073
Income tax expense (7,604) (7,033)
Net income, including noncontrolling interests 33,759 20,040
Less: Net income attributable to noncontrolling interests (2,711) (391)
Net income attributable to Sterling common stockholders $ 31,048 $ 19,649
Net income per share attributable to Sterling common stockholders:    
Basic (in dollars per share) $ 1.00 $ 0.64
Diluted (in dollars per share) $ 1.00 $ 0.64
Weighted average common shares outstanding:    
Basic (in shares) 30,977 30,618
Diluted (in shares) 31,186 30,789