Quarterly report pursuant to Section 13 or 15(d)

SENIOR AND CONVERTIBLE SENIOR NOTES, NET - Schedule of Senior and Convertible Senior Notes, Net (Details)

v3.5.0.2
SENIOR AND CONVERTIBLE SENIOR NOTES, NET - Schedule of Senior and Convertible Senior Notes, Net (Details) - Senior Notes [Member] - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Net debt issuance costs $ (8,859) $ (10,745)
Senior and convertible senior notes, net 1,094,632 1,093,173
4.50% senior notes due 2018 [Member]    
Debt Instrument [Line Items]    
Senior and convertible senior notes, gross $ 175,000 $ 175,000
Debt instrument, stated rate (percent) 4.50% 4.50%
7.15% senior notes due 2020 [Member]    
Debt Instrument [Line Items]    
Senior and convertible senior notes, gross $ 301,991 $ 302,418
Debt instrument, stated rate (percent) 7.15% 7.15%
Unamortized premium $ 1,991 $ 2,418
7.00% senior notes due 2022 [Member]    
Debt Instrument [Line Items]    
Senior and convertible senior notes, gross $ 300,000 $ 300,000
Debt instrument, stated rate (percent) 7.00% 7.00%
6.00% senior notes due 2025 [Member]    
Debt Instrument [Line Items]    
Senior and convertible senior notes, gross $ 200,000 $ 200,000
Debt instrument, stated rate (percent) 6.00% 6.00%
1.875% convertible senior notes due 2032 [Member]    
Debt Instrument [Line Items]    
Senior and convertible senior notes, gross [1] $ 126,500 $ 126,500
Debt instrument, stated rate (percent) 1.875% 1.875%
[1] The Convertible Notes may be redeemed by the note-holders on the fifth, tenth and fifteenth anniversary dates of the September 18, 2012 issuance date of the Convertible Notes.