Restructuring Charges (Outsourcing Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ (84)	$ 2,498
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	197	566
Special Charges (Income)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	(281)	1,802
Outsourcing of U.S. Decorating Business
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(135)
Building Site Clean-up and Fixed Asset Write-Down | Outsourcing of U.S. Decorating Business
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(135)
Glass Operations | Outsourcing of U.S. Decorating Business | Special Charges (Income)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(300)
Glass Operations | Write-down of Inventory and Spare Machine Parts | Outsourcing of U.S. Decorating Business | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges		197	566
Glass Operations | Building Site Clean-up and Fixed Asset Write-Down | Outsourcing of U.S. Decorating Business | Special Charges (Income)
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 700