Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Details)

v3.3.1.900
Debt - Additional Information (Details) - USD ($)
shares in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Senior Secured Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum consolidated leverage 500.00%    
7% Exchangeable Senior Subordinated Notes due 2014 [Member]      
Debt Instrument [Line Items]      
Principal amount of Exchangeable Notes converted to common stock.   $ 502,370,000  
Conversion of Exchangeable Notes to common stock   272,856  
Gains (losses) on repurchase of debt   $ 0  
Interest rate on instrument 7.00% 7.00% 7.00%
8.75% Senior Notes due 2015 [Member]      
Debt Instrument [Line Items]      
Gains (losses) on repurchase of debt     $ (104,818,000)
Interest rate on instrument     8.75%
Repurchase of debt, amount     $ 800,000,000
Amount paid on repurchase of debt     927,860,000
7.625% Senior Notes due 2018 [Member]      
Debt Instrument [Line Items]      
Gains (losses) on repurchase of debt     $ (85,759,000)
Interest rate on instrument     7.625%
Repurchase of debt, amount     $ 700,000,000
Amount paid on repurchase of debt     $ 797,830,000