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Note 11 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   

Year Ended December 31,

 
    2014     2013     2012  
    (Dollars in thousands)  

Current (provision) benefit for income taxes:

                       

Federal

  $ (28,942 )   $ 11,766     $ (766 )

State

    (6,159 )     (1,880 )      
      (35,101 )     9,886       (766 )

Deferred (provision) benefit for income taxes:

                       

Federal

    (84,704 )     (56,752 )     338,500  

State

    (14,294 )     (22,117 )     115,500  
      (98,998 )     (78,869 )     454,000  

(Provision) benefit for income taxes

  $ (134,099 )   $ (68,983 )   $ 453,234  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   

December 31,

 
   

2014

   

2013

 
   

(Dollars in thousands)

 

Inventory valuation adjustments

  $ 84,443     $ 114,063  

Financial accruals

    39,653       42,450  

Federal net operating loss carryforwards

    102,971       161,265  

State net operating loss carryforwards

    40,731       48,901  

Tax credit carryforwards

    4,428       4,445  

Goodwill impairment charges

    7,150       8,566  

Other, net

    (413 )     301  

Total deferred tax asset

    278,963       379,991  

Less: Valuation allowance

    (2,561 )     (4,591 )

Net deferred tax asset

  $ 276,402     $ 375,400  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

Year Ended December 31,

 
   

2014

   

2013

   

2012

 
   

(Dollars in thousands)

 
                         

Income before taxes

  $ 349,964     $ 257,698     $ 78,187  

(Provision) benefit for income taxes at federal statutory rate

  $ (122,488 )   $ (90,194 )   $ (27,365 )

(Increases) decreases in tax resulting from:

                       

State income taxes, net of federal benefit

    (12,961 )     (9,426 )     (2,947 )

Net deferred tax asset valuation (allowance) benefit

    2,030       13,115       483,724  

(Increases) decreases in liability for unrecognized tax benefits

    (1,605 )     16,105        

Domestic production activities deduction

    1,562              

Other, net

    (637 )     1,417       (178 )

(Provision) benefit for income taxes

  $ (134,099 )   $ (68,983 )   $ 453,234  

Effective tax rate

    38.3 %     26.8 %      
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
   

Year Ended December 31,

 
   

2014

   

2013

 
   

(Dollars in thousands)

 
                 

Balance, beginning of the year

  $ 472     $ 13,484  

Changes based on tax positions related to the current year

    1,567       472  

Changes for tax position in prior years

    497        

Reductions due to lapse of statute of limitations

          (13,484 )

Settlements

           

Balance, end of the year

  $ 2,536     $ 472