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Note 7 - Commitments and Contingencies (Details) (USD $)
 12 Months Ended 1 Months Ended 7 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2006
Per Violation [Member]
Dec. 31, 2013
Cash and Vouchers [Member]
Dec. 31, 2013
For Each Claim Representative [Member]
Dec. 31, 2013
Selling, General and Administrative Expenses [Member]
Accounts Payable and Accrued Liabilities [Member]
Dec. 31, 2013
Lifetime Oil Contracts [Member]
Dec. 31, 2013
Assumed Lifetime Oil Contracts [Member]
Note 7 - Commitments and Contingencies (Details) [Line Items]                  
Operating Leases, Rent Expense, Minimum Rentals $ 14,000,000 $ 15,200,000 $ 13,300,000            
Payments to Acquire Property, Plant, and Equipment 50,025,000 64,584,000 31,673,000            
Charge-Backs Liabilities 18,182,000                
Deferred Revenue               50,100,000  
Contracts Obligations Reserve                 3,400,000
Self Insurance Reserve 12,000,000 12,400,000              
Loss Contingency, Damages Sought, Value       500          
Loss Contingency, Damages Awarded, Value         450 3,000      
Loss Contingency Accrual, Provision             $ 6,200,000