Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (Debt Extinguishment) (Details)

v3.6.0.2
LONG-TERM DEBT (Debt Extinguishment) (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2016
Sep. 30, 2014
Jul. 31, 2014
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
May 31, 2014
Debt Instrument [Line Items]                
Cash available for general corporate purposes $ 256,900,000 $ 293,900,000            
Loss on Extinguishment of Debt       $ (14,049,000) $ (14,049,000) $ 0 $ (188,000)  
4.875% Senior Notes Due 2024 [Member]                
Debt Instrument [Line Items]                
Face amount $ 575,000,000              
Interest rate, stated percentage 4.875%     4.875% 4.875%      
7% Senior Notes Due 2020 [Member]                
Debt Instrument [Line Items]                
Interest rate, stated percentage 7.00%              
Extinguishment of debt $ 425,000,000              
Redemption Premium Payment, Extinguishment of Debt 14,900,000              
5.375% Senior Notes due 2022 [Member]                
Debt Instrument [Line Items]                
Face amount               $ 250,000,000
Interest rate, stated percentage       5.375% 5.375%     5.375%
2.5% Convertible Senior Notes Due 2019 [Member]                
Debt Instrument [Line Items]                
Face amount       $ 275,000,000 $ 275,000,000 $ 275,000,000   $ 275,000,000
Interest rate, stated percentage       2.50% 2.50%     2.50%
5.375% Senior Notes & 2.5% Convertible Senior Notes [Member]                
Debt Instrument [Line Items]                
Related Fees and Expenses               $ 9,800,000
2.875% Convertible Senior Notes Due 2027 [Member]                
Debt Instrument [Line Items]                
Interest rate, stated percentage     2.875%       2.875%  
Extinguishment of debt   220,000,000 $ 29,300,000          
Payment of accrued interest   1,100,000            
Related fees & expenses, debt extinguishment   $ 200,000            
Senior Secured Credit Facility [Member] | 4.875% Senior Notes Due 2024 [Member]                
Debt Instrument [Line Items]                
Proceeds from Issuance of Debt 858,500,000              
Old Senior Secured Credit Facility Term Loans A and B [Member]                
Debt Instrument [Line Items]                
Extinguishment of debt 123,300,000              
Old Senior Secured Credit Facility Term Loans A and B [Member] | 7% Senior Notes Due 2020 [Member]                
Debt Instrument [Line Items]                
Payment of Accrued Interest and Fees $ 38,400,000