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Supplemental Guarantor And Parent Company Condensed Financial Information (Narrative) (Details)
 12 Months Ended 12 Months Ended
Dec. 31, 2011
EUR (€)
Dec. 31, 2011
0.875% Convertible Notes Due 2013 [Member]
Jul. 22, 2011
0.875% Convertible Notes Due 2013 [Member]
USD ($)
Nov. 30, 2006
0.875% Convertible Notes Due 2013 [Member]
Dec. 31, 2011
1.00% Senior Convertible Notes Due 2012 [Member]
Dec. 31, 2008
1.00% Senior Convertible Notes Due 2012 [Member]
Sep. 30, 2007
1.00% Senior Convertible Notes Due 2012 [Member]
USD ($)
Dec. 31, 2011
7.125% Senior Notes Due 2017 [Member]
USD ($)
Dec. 31, 2010
7.125% Senior Notes Due 2017 [Member]
USD ($)
Dec. 31, 2011
Parent Company [Member]
USD ($)
Dec. 31, 2010
Parent Company [Member]
USD ($)
Dec. 31, 2009
Parent Company [Member]
USD ($)
Dec. 31, 2010
Parent Company [Member]
0.875% Convertible Notes Due 2013 [Member]
USD ($)
Dec. 31, 2010
Parent Company [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
USD ($)
Dec. 31, 2010
Parent Company [Member]
7.125% Senior Notes Due 2017 [Member]
USD ($)
Dec. 31, 2011
North America [Member]
Parent Company [Member]
0.875% Convertible Notes Due 2013 [Member]
USD ($)
Dec. 31, 2010
North America [Member]
Parent Company [Member]
0.875% Convertible Notes Due 2013 [Member]
USD ($)
Nov. 30, 2006
North America [Member]
Parent Company [Member]
0.875% Convertible Notes Due 2013 [Member]
USD ($)
Dec. 31, 2011
North America [Member]
Parent Company [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
USD ($)
Dec. 31, 2010
North America [Member]
Parent Company [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
USD ($)
Dec. 15, 2009
North America [Member]
Parent Company [Member]
1.00% Senior Convertible Notes Due 2012 [Member]
USD ($)
Dec. 31, 2011
North America [Member]
Parent Company [Member]
7.125% Senior Notes Due 2017 [Member]
USD ($)
Dec. 31, 2011
North America [Member]
Parent Company [Member]
Senior Floating Notes Due In 2015 [Member]
USD ($)
Debt principal amount     $ 355,000,000       $ 475,000,000 $ 200,000,000 $ 200,000,000       $ 355,000,000 $ 10,600,000 $ 200,000,000 $ 355,000,000 $ 355,000,000 $ 355,000,000 $ 10,600,000 $ 10,600,000 $ 10,600,000 $ 200,000,000 $ 125,000,000
Interest rate on senior convertible notes   0.875%   7.35% 1.00% 7.50%   7.125%                              
Term loan covenant percentage 25.00%                                            
Debt maturity date                               2013     2012     2017 2015
Cash dividend paid                   0 0 0                      
Term loan subsidiary minimum net assets € 197,000,000