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Note 11 - Variable Interest Entities (Detail) - Summary financial information of Myers included int consolidated balance sheet: (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Current assets:        
Cash and cash equivalents $ 4,154 $ 3,142 $ 16,610 $ 16,371
Contracts receivable, including retainage 64,391 70,815    
Other current assets 8,194 4,459    
Total current assets 149,243 164,758    
Property and equipment, net 101,902 102,308    
Goodwill 54,820 54,820    
Total assets 316,147 331,510    
Current liabilities:        
Accounts payable 54,051 47,796    
Total current liabilities 2,700 2,691    
Variable Interest Entity, Primary Beneficiary [Member]
        
Current assets:        
Cash and cash equivalents 3,153 7,164    
Contracts receivable, including retainage 2,490 2,866    
Other current assets 4,102 1,214    
Total current assets 9,745 11,244    
Property and equipment, net 4,933 3,041    
Goodwill 1,501 1,501    
Total assets 16,179 15,786    
Current liabilities:        
Accounts payable 6,521 4,627    
Other current liabilities 4,414 6,283    
Total current liabilities 10,935 10,910    
Long-term liabilities:        
Total liabilities $ 10,935 $ 10,910