Share-Based Compensation (Allocated Share-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	$ 4,321	$ 5,845	$ 4,820
Tax effect of share-based compensation	(1,599)	(2,221)	(1,832)
Total, net of tax	2,722	3,624	2,988
Stock Options [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	432	522	482
Stock Options [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	3,889	5,323	4,338
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	5,509	7,360	6,954
Tax effect of share-based compensation	(2,038)	(2,797)	(2,643)
Total, net of tax	3,471	4,563	4,311
Restricted Stock [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	551	666	695
Restricted Stock [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	4,958	6,694	6,259
Restricted Stock Grants [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax		1,740	1,962
Tax effect of share-based compensation		(661)	(746)
Total, net of tax		1,079	1,216
Restricted Stock Grants [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax		174	196
Restricted Stock Grants [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax		1,566	1,766
Cash-Settled Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	1,320	492
Tax effect of share-based compensation	(488)	(187)
Total, net of tax	832	305
Cash-Settled Restricted Stock Units [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	132	49
Cash-Settled Restricted Stock Units [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	$ 1,188	$ 443