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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2012
Income Taxes [Abstract]  
Schedule of Federal and State Income Tax Provision
Year ended December 31,   2012     2011     2010  
    Current     Deferred     Current     Deferred     Current     Deferred  
Federal   $ 34,941     $ (327 )   $ 11,371     $ 7,948     $ 11,675     $ 1,112  
State     6,635       231       3,926       256       2,814       293  
    $ 41,576     $ (96 )   $ 15,297     $ 8,204     $ 14,489     $ 1,405  

 
Schedule of Effective Income Tax Rate Reconciliation

 

Year ended December 31,   2012     2011     2010  
Statutory federal income tax rate     35.0 %     35.0 %     35.0 %
State income taxes, net of federal tax benefit     4.0       4.3       4.6  
Domestic production activities deduction     (3.0 )     (1.8 )     (2.7 )
Other items     1.0       (0.5 )     (0.9 )
Effective income tax rate     37.0 %     37.0 %     36.0 %

 
Schedule of Deferred Tax Assets and Liabilities
December 31,   2012     2011  
Deferred tax assets:                
Product liability   $ 391     $ 646  
Employee compensation and benefits     3,343       3,374  
Allowances for doubtful accounts and discounts     1,123       1,625  
Inventories     688       533  
Additional minimum pension liability     17,396       16,176  
Stock-based compensation     2,116       1,089  
Other     859       259  
Total deferred tax assets     25,916       23,702  
Deferred tax liabilities:                
Pension plans     10,205       9,217  
Depreciation     8,069       8,401  
Other     354       276  
Total deferred tax liabilities     18,628       17,894  
Net deferred tax assets   $ 7,288     $ 5,808