Share-Based Compensation (Allocated Share-Based Compensation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	$ 968	$ 1,011	$ 2,000	$ 2,503
Tax effect of share-based compensation	(358)	(384)	(740)	(951)
Total, net of tax	610	627	1,260	1,552
Stock Options [Member] | Cost of goods sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	97	910	200	2,253
Stock Options [Member] | Selling, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	871	101	1,800	250
Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	1,180	1,405	2,452	3,080
Tax effect of share-based compensation	(437)	(534)	(907)	(1,170)
Total, net of tax	743	871	1,545	1,910
Restricted Stock Units [Member] | Cost of goods sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	118	1,265	245	2,772
Restricted Stock Units [Member] | Selling, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	1,062	140	2,207	308
Cash-Settled Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total, pre-tax	480	285	1,322	1,038
Tax effect of share-based compensation	(178)	(108)	(489)	(394)
Total, net of tax	302	177	833	644
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	48	257	132	934
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	$ 432	$ 28	$ 1,190	$ 104