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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Income Taxes [Abstract]  
Schedule of Federal and State Income Tax Provision
Year ended December 31, 2015     2014     2013  
      Current       Deferred       Current       Deferred       Current       Deferred  
Federal   $ 31,382     $ (2,774   $ 25,797     $ (10,429   $ 49,022     $ 4,879
State     5,849       (483     5,019       (1,775     9,202       857  
    $ 37,231     $ (3,257   $ 30,816     $ (12,204   $ 58,224     $ 5,736
Schedule of Effective Income Tax Rate Reconciliation
Year ended December 31, 2015     2014     2013  
Statutory federal income tax rate     35.0 %     35.0 %     35.0 %
State income taxes, net of federal tax benefit     3.6       3.7       3.7  
Domestic production activities deduction     (3.2 )     (4.6 )     (2.7 )
Other items           (1.6 )     0.5  
Effective income tax rate     35.4 %     32.5 %     36.5 %
Schedule of Deferred Tax Assets and Liabilities
December 31,   2015     2014  
Deferred tax assets                
Product Liability   $ 263     $ 289  
Employee compensation and benefits     3,822       3,621  
Allowances for doubtful accounts and discounts     3,454       2,351  
Inventories     886       1,411  
Stock-based compensation     5,410       4,517  
Other     1,623       1,487  
Total deferred tax assets     15,458       13,676  
Deferred tax liabilities:                
Depreciation     12,946       14,377  
Other     343       387  
Total deferred tax liabilities     13,289       14,764  
Net deferred tax (liabilities) assets   $ 2,169
  $ (1,088 )