Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Pro Forma [Member]	Dec. 31, 2012 Venezuelan bolívar [Member]	Feb. 26, 2013 Venezuelan bolívar [Member] Subsequent Event [Member]	Dec. 31, 2012 Venezuelan bolívar [Member] Cash and Cash Equivalents [Member]
Subsequent Event [Line Items]
Exchange rate, bolivar to U.S. dollar	4.3			6.3
Net monetary assets denominated in Venezuelan bolivars			$ 2.0
Asset denominated in Venezuelan bolivars					1.0
Translation loss if the devaluation occurred in 2012		0.6
Charge expected to be recognized in the first quarter of 2013, related to the devaluation	$ 0.7