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Indebtedness (Components Of Indebtedness) (Details)
Mar. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Mar. 31, 2014
1 1/4% Convertible Senior Subordinated Notes Due 2036 [Member]
USD ($)
Dec. 31, 2013
1 1/4% Convertible Senior Subordinated Notes Due 2036 [Member]
USD ($)
Mar. 31, 2014
4 1/2% Senior Unsecured Term Loan Due May 2, 2016 [Member]
USD ($)
Mar. 31, 2014
4 1/2% Senior Unsecured Term Loan Due May 2, 2016 [Member]
EUR (€)
Dec. 31, 2013
4 1/2% Senior Unsecured Term Loan Due May 2, 2016 [Member]
USD ($)
Mar. 31, 2014
5 7/8% Senior Notes due 2021 [Member]
USD ($)
Dec. 31, 2013
5 7/8% Senior Notes due 2021 [Member]
USD ($)
Debt Instrument [Line Items]                  
Debt instrument, interest rate, percent     1.25% 1.25% 4.50% 4.50% 4.50% 5.875% 5.875%
Convertible debt $ 151,600,000 $ 201,200,000              
Senior notes         275,500,000 200,000,000.0 275,000,000 300,000,000 300,000,000
Credit facility 437,300,000 360,000,000              
Other long-term debt 120,200,000 114,000,000              
Total indebtedness 1,284,600,000 1,250,200,000              
Less: Current portion of long-term debt (118,700,000) (110,500,000)              
Convertible Notes Payable, Current (151,600,000) (201,200,000) (151,600,000) (201,200,000)          
Total indebtedness, less current portion $ 1,014,300,000 $ 938,500,000