Share-Based Compensation (Allocated Share-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	$ 1,032	$ 1,492
Tax effect of share-based compensation	(382)	(567)
Total, net of tax	650	925
Stock Options [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	103	149
Stock Options [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	929	1,343
Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	1,272	1,675
Tax effect of share-based compensation	(471)	(637)
Total, net of tax	801	1,038
Restricted Stock Units [Member] | Cost Of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	127	168
Restricted Stock Units [Member] | Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	1,145	1,507
Cash-Settled Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	842	753
Tax effect of share-based compensation	(312)	(286)
Total, net of tax	530	467
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	84	75
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	$ 758	$ 678