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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Total Sterling Stockholders’ Equity
Common Stock
Additional Paid in Capital
Treasury Stock
Retained Earnings
Accumulated Other Comprehensive Loss
Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2020     28,184   95      
Beginning balance at Dec. 31, 2020 $ 268,729 $ 267,270 $ 283 $ 256,423 $ (1,445) $ 17,273 $ (5,264) $ 1,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 11,668 10,555       10,555   1,113
Change in interest rate swap 895 895         895  
Stock-based compensation 1,835 1,835   1,835        
Distributions to owners (1,959)             (1,959)
Issuance of stock (in shares)     668   (111)      
Issuance of stock 144 144 $ 5 (1,602) $ 1,741      
Shares withheld for taxes (in shares)     246   16      
Shares withheld for taxes (5,619) (5,619) $ (2) (5,321) $ (296)      
Ending balance (in shares) at Mar. 31, 2021     28,606   0      
Ending balance at Mar. 31, 2021 275,693 275,080 $ 286 251,335 $ 0 27,828 (4,369) 613
Beginning balance (in shares) at Dec. 31, 2021     29,838          
Beginning balance at Dec. 31, 2021 360,227 358,767 $ 298 280,274   79,918 (1,723) 1,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 19,523 19,252       19,252   271
Change in interest rate swap 1,563 1,563         1,563  
Stock-based compensation 3,521 3,521   3,521        
Issuance of stock (in shares)     688          
Issuance of stock 192 192 $ 7 185        
Shares withheld for taxes (in shares)     263          
Shares withheld for taxes (7,386) (7,386) $ (3) (7,383)        
Ending balance (in shares) at Mar. 31, 2022     30,263          
Ending balance at Mar. 31, 2022 $ 377,640 $ 375,909 $ 302 $ 276,597   $ 99,170 $ (160) $ 1,731