v2.3.0.11
Equity Incentive Plans (Stock-Based Compensation Expense Included In Statements Of Income) (Details) (USD $)
In Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Stock-based compensation expense, before tax $ 3,260 $ 2,588 $ 6,602 $ 5,112
Income tax benefit (1,252) (1,017) (2,555) (2,009)
Total stock-based compensation expense, net of tax 2,008 1,571 4,047 3,103
Cost of Goods Sold [Member]
        
Stock-based compensation expense, before tax 79 73 168 143
Facility And Warehouse Expenses [Member]
        
Stock-based compensation expense, before tax 623 540 1,234 1,067
Selling General And Administrative Expenses [Member]
        
Stock-based compensation expense, before tax $ 2,558 $ 1,975 $ 5,200 $ 3,902