Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (Debt Extinguishment) (Details)

v3.3.1.900
LONG-TERM DEBT (Debt Extinguishment) (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2014
Jul. 31, 2014
May. 31, 2014
Aug. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]              
Cash available for general corporate purposes $ 293,900,000     $ 22,400,000      
Debt premium         $ 6,000,000 $ 7,286,000  
Loss on extinguishment of debt         $ 0 188,000 $ 36,269,000
5.375% Senior Notes due 2022 [Member]              
Debt Instrument [Line Items]              
Face amount     $ 250,000,000        
Interest rate, stated percentage     5.375%   5.375%    
2.5% Convertible Senior Notes Due 2019 [Member]              
Debt Instrument [Line Items]              
Face amount     $ 275,000,000   $ 275,000,000 $ 275,000,000  
Interest rate, stated percentage     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            
7% Senior Notes Due 2020 [Member]              
Debt Instrument [Line Items]              
Face amount         $ 425,000,000    
Interest rate, stated percentage       7.00% 7.00%    
Related fees and expenses       $ 22,000,000      
Proceeds from issuance of debt       802,200,000      
Senior Secured Credit Facility [Member]              
Debt Instrument [Line Items]              
Extinguishment of debt       472,500,000      
Add-on 7% Senior Notes Due 2020 [Member]              
Debt Instrument [Line Items]              
Face amount         $ 200,000,000    
Debt premium       $ 9,000,000      
8.125% Senior Notes Due 2018 [Member]              
Debt Instrument [Line Items]              
Interest rate, stated percentage       8.125%      
Extinguishment of debt       $ 250,000,000      
Redemption premium and accrued interest       35.3      
Loss on extinguishment of debt       $ 36,300,000