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Note 2 - Acquisition of Chicago Tube and Iron Company: (Detail) (USD $)
 6 Months Ended
Sep. 30, 2011
Jun. 30, 2012
Jul. 31, 2011
Business Acquisition, Cost of Acquired Entity, Purchase Price     $ 159,900,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred (in Dollars)   5,900,000 5,900,000
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents     11,100,000
Business Combination, Acquisition Related Costs 919,000    
Acquistion Costs Gross [Member]
      
Business Acquisition, Cost of Acquired Entity, Purchase Price     159,900,000
Base Purchase Price [Member]
      
Business Acquisition, Cost of Acquired Entity, Purchase Price     150,000,000
Ancillary Acquisition Costs [Member]
      
Business Acquisition, Cost of Acquired Entity, Cash Paid     $ 9,900,000