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Note 9 - Income Taxes (Detail) (USD $)
 3 Months Ended 12 Months Ended
Sep. 30, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate   35.00%    
Goodwill, Impairment Loss (in Dollars) $ 11,500,000   $ 11,539,000  
Goodwill Impairment Tax Deductible     2,100,000  
Goodwill Impairment Loss, Tax Nondeductible     9,400,000  
Deferred Tax Assets, Net, Current   4,600,000    
Deferred Tax Liabilities, Net, Noncurrent   49,837,000 42,670,000  
Deferred Tax Liabilities, Net   45,195,000 38,287,000  
Deferred Tax Assets, Valuation Allowance   299,000 550,000  
Unrecognized Tax Benefits   2,600,000 3,300,000  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued   1,000,000 1,300,000  
Income Tax Examination, Penalties and Interest Expense   (300,000) 100,000 200,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate   $ 1,700,000 $ 2,000,000