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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted The following table reconciles the numerators and denominators of the basic and diluted per common share computations for net income attributable to Sterling common stockholders:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
Numerator:
Net income attributable to Sterling common stockholders$15,157 $7,957 $36,482 $17,600 
Denominator:
Weighted average common shares outstanding — basic28,003 26,365 27,832 26,359 
Shares for dilutive unvested stock and warrants230 272 154 302 
Weighted average common shares outstanding — diluted28,233 26,637 27,986 26,661 
Basic net income per share attributable to Sterling common stockholders$0.54 $0.30 $1.31 $0.67 
Diluted net income per share attributable to Sterling common stockholders$0.54 $0.30 $1.30 $0.66