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Note 19 - Quarterly Financial Information (Tables)
12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
   
2013 Quarters Ended (unaudited)
       
   
March 31
   
June 30
   
September 30
   
December 31
   
Total
 
Revenues
  $ 111,035     $ 133,350     $ 185,935     $ 125,916     $ 556,236  
Gross profit (loss)
    1,385       (16,635 )     8,359       (23,053 )     (29,944 )
Income (loss) before income taxes and earnings attributable to noncontrolling interests
    (7,219 )     (25,967 )     1,715       (37,333 )     (68,804 )
Net loss attributable to Sterling common stockholders
    (4,580 )     (17,025 )     (189 )     (52,135 )     (73,929 )
Net loss per share attributable to Sterling common stockholders:
                                       
Basic
  $ (0.39 )   $ (0.93 )   $ (0.06 )   $ (3.52 )   $ (4.91 )
Diluted
    (0.39 )     (0.93 )     (0.06 )     (3.52 )     (4.91 )
   
2012 Quarters Ended (unaudited)
       
   
March 31
   
June 30
   
September 30
   
December 31
   
Total
 
Revenues
  $ 98,425     $ 168,709     $ 205,284     $ 158,089     $ 630,507  
Gross profit
    1,873       15,159       14,170       16,270       47,472  
Income (loss) before income taxes and earnings attributable to noncontrolling interests
    (3,781 )     8,652       4,915       7,347       17,133  
Net income (loss) attributable to Sterling common stockholders
    (7,500 )     3,287       990       2,926       (297 )
Net income (loss) per share attributable to Sterling common stockholders:
                                       
Basic
  $ (0.44 )   $ 0.15     $ 0.01     $ 0.01     $ (0.26 )
Diluted
    (0.44 )     0.15       0.01       0.01       (0.26 )