Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details)

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Stock-Based Compensation Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 8,878,000 $ 7,833,000 $ 7,870,000
Income tax benefits (3,102,000) (2,724,000) (2,729,000)
Total stock-based compensation expense, net of tax 5,776,000 5,109,000 5,141,000
Cost of Sales [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense 347,000 287,000 282,000
Selling, General and Administrative Expense [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 8,531,000 $ 7,546,000 $ 7,588,000