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Debt - 8.25% Senior Secured Notes (Details) - Senior Secured Notes - USD ($)
2 Months Ended 4 Months Ended 12 Months Ended
Mar. 13, 2015
Mar. 10, 2015
Jul. 01, 2013
Jun. 05, 2013
Jun. 15, 2015
Apr. 13, 2015
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]                
Writedown of capitalized debt costs               $ 9,600,000
8.25% Senior Secured Notes                
Debt Instrument [Line Items]                
Interest rate       8.25%     8.25%  
Aggregate principal amount $ 305,000,000     $ 305,000,000     $ 305,000,000.0  
Escrow agent fees and expenses     $ 3,000,000          
Redemption notice, period 30 days              
Funds held in escrow $ 330,200,000         $ 330,200,000    
Accrued interest for the period           $ 8,200,000    
Make-whole premium percentage           4.125%    
Debt make-whole premium         $ 16,500,000   16,500,000  
Other miscellaneous charges         $ 400,000      
Writedown of capitalized debt costs             $ 8,500,000  
8.25% Senior Secured Notes | Prior to June 15, 2015                
Debt Instrument [Line Items]                
Redemption price percentage       100.00%        
6.875% Senior Secured Notes                
Debt Instrument [Line Items]                
Interest rate   6.875%         6.875%  
Redemption price percentage   106.875%