Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Additional Income Taxes (Textual) [Abstract]
Interest and penalties associated with uncertain tax positions	$ 0.40	$ 0.04	$ 0.03
Cumulative amount of temporary differences related to investments in foreign subsidiaries		$ 170	$ 170
Foreign tax credit expiration period	expires if unused by 2019
United States [Member]
Income Taxes (Textual) [Abstract]
Operating loss expiration period	2017 through 2031
Capital losses expiration period	expires in 2012
Canada [Member]
Income Taxes (Textual) [Abstract]
Operating loss expiration period	2028 through 2029
Mexico [Member]
Income Taxes (Textual) [Abstract]
Operating loss expiration period	2017 through 2019