Debt (Senior Notes And Senior Subordinated Notes Narrative) (Details)	12 Months Ended
	Dec. 31, 2011 6 1/8% Senior Notes Due 2022 [Member]	Dec. 31, 2011 7 1/2% Senior Subordinated Notes Due 2020 [Member]	Dec. 31, 2011 8% Senior Notes Due 2016 [Member]	Dec. 31, 2011 2% Subordinated Note Due 2012 [Member] USD ($)	Dec. 31, 2011 Euro-Denominated [Member] 7 1/2% Senior Subordinated Notes Due 2020 [Member] EUR (€)
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount					€ 150,000,000
Interest rate of debt instrument	6.125%	7.50%	8.00%	2.00%
Debt instrument maturity year	2022	2020	2016	2012
Debt instrument, redemption prices range percentage, minimum	100.00%	100.00%	100.00%
Debt instrument, redemption prices range percentage, maximum	103.00%	104.00%	104.00%
Debt instrument, redemption date	November 2015	January 2015	May 2013
Debt instrument, redemption at the option of holder based on common stock price, minimum price to call for redemption				$ 45.32
Debt instrument, redemption at the option of holder based on common stock price, minimum required consecutive trading days				three