Derivative Financial Instruments (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Apr. 02, 2012	Mar. 31, 2010	Mar. 31, 2012 Interest Rate Swap [Member]	Dec. 31, 2011 Intangible and other long-term assets [Member]
Derivative Financial Instruments (Textual) [Abstract]
Derivative asset						$ 1.9
Interest income (expense) related to the ineffectiveness associated with the fair value hedge		0.4
Selling of interest rate swap	1.2				0.9
Derivative Financial Instruments (Additional Textual) [Abstract]
Interest rate swap agreement for notional amount			$ 100	$ 150
Adjusted time of variable interest	90 days
Termination date of instrument.	Dec. 15, 2021
Semi annual interest payments at fixed rate			7.125%