Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Stock-Based Compensation (Schedule of Stock-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 10,986 $ 11,672 $ 11,120
Income tax benefits (3,969) (4,044) (3,874)
Total stock-based compensation expense, net of tax 7,017 7,628 7,246
Cost of Sales [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense 233 326 399
Selling, General and Administrative Expense [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax stock-based compensation expense $ 10,753 $ 11,346 $ 10,721