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Note 10 - Variable Interest Entities (Detail) - Summary financial information of Myers included int consolidated balance sheet: (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Current assets:        
Cash and cash equivalents $ 19,112 $ 16,371 $ 10,267 $ 49,441
Contracts receivable, including retainage 88,788 74,875    
Other current assets 5,032 2,132    
Total current assets 189,841 164,023    
Property and equipment, net 102,403 83,429    
Goodwill 54,460 54,050    
Total assets 352,882 303,831    
Current liabilities:        
Accounts payable 62,272 40,064    
Total current liabilities 4,367 2,723    
Variable Interest Entity, Primary Beneficiary [Member]
        
Current assets:        
Cash and cash equivalents 3,155 1,365    
Contracts receivable, including retainage 12,133 2,244    
Other current assets 135 419    
Total current assets 15,423 4,028    
Property and equipment, net 2,713 926    
Goodwill 1,501 1,541    
Total assets 19,637 6,495    
Current liabilities:        
Accounts payable 12,010 1,134    
Other current liabilities 4,061 2,323    
Total current liabilities 16,071 3,457    
Long-term liabilities:        
Total liabilities $ 16,071 $ 3,457