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Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock Option Pricing Model To Estimate The Fair Value Of Stock Option Awards
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Risk-free interest rate     0.8 %     2.2 %
Expected life (in years)     4.7       5.2  
Expected volatility     43.9 %     44.6 %
Dividend     0 %     0 %
Summary Of Weighted Average Per Share Fair Value Of Options Granted
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Weighted average per share fair value of options granted   $ 12.44     $ 15.42  
Summary Of Stock Option Activity
    Shares     Weighted Average Exercise Price     Weighted Average Remaining Life     Aggregate Intrinsic Value  
Balance at December 31, 2011     2,286     $ 30.11                  
  Granted     304       32.90                  
  Exercised     (181 )     20.12                  
  Forfeited     (19 )     30.34                  
Balance at March 31, 2012     2,390     $ 31.22       5.8     $ 25,890  
Exercisable at March 31, 2012     1,553     $ 33.30       4.4     $ 16,367  
Vested and expected to vest at
    March 31, 2012
    2,265     $ 31.18       5.6     $ 25,044  
Total Fair Value Of Shares Vested
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Total fair value of shares vested   $ 3,057     $ 3,755  
Schedule Of Shares Purchased By Employees Under Employee Stock Purchase Program
    Year Ended  
    March 31,     March 31,  
    2012     2011  
Shares purchased by employees     2       3  
Stock Options [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Allocated Share-Based Compensation
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Cost of goods sold   $ 103     $ 149  
Selling, general and administrative     929       1,343  
Total, pre-tax   $ 1,032     $ 1,492  
Tax effect of share-based compensation     (382 )     (567 )
Total, net of tax   $ 650     $ 925  
Restricted Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Allocated Share-Based Compensation
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Cost of goods sold   $ 127     $ 168  
Selling, general and administrative     1,145       1,507  
Total, pre-tax   $ 1,272     $ 1,675  
Tax effect of stock-based compensation     (471 )     (637 )
Total, net of tax   $ 801     $ 1,038  
Summary Of Stock Option Activity
    Shares     Weighted Average Grant Price     Aggregate Intrinsic Value  
Non-vested balance at December 31, 2011     281     $ 24.28          
  Granted     99       32.89          
  Vested     (125 )     21.67          
  Forfeited     (7 )     31.67          
Non-vested balance at March 31, 2012     248     $ 28.80     $ 9,614  
Summary Of Restricted Stock Activity And Restricted Stock Unit Activity
    Shares     Weighted Average Grant Price     Aggregate Intrinsic Value  
Non-vested restricted stock unit balance at
   December 31, 2011
    69     $ 36.47          
  Granted     77       32.75          
  Vested     (19 )     35.90          
  Forfeited     -       -          
Non-vested restricted stock unit balance at
   March 31, 2012
    127     $ 34.30     $ 4,903  
Vested awards not issued     187     $ 23.72     $ 7,267  
Total restricted stock unit balance at
   March 31, 2012
    314     $ 27.98     $ 12,170  
                         
Cash-Settled Restricted Stock Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Allocated Share-Based Compensation
    Three months ended  
    March 31,     March 31,  
    2012     2011  
Cost of goods sold   $ 84     $ 75  
Selling, general and administrative     758       678  
Total, pre-tax   $ 842     $ 753  
Tax effect of stock-based compensation     (312 )     (286 )
Total, net of tax   $ 530     $ 467  
Summary Of Stock Option Activity
    Number of Awards     Weighted Average Grant Date Fair Value     Aggregate Intrinsic Value  
Awards outstanding at December 31, 2011     149     $ 32.97          
  Granted     129       33.02          
  Vested     (38 )     32.55          
  Forfeited     (9 )     31.39          
Awards outstanding at March 31, 2012     231     $ 33.13     $ 8,943