Quarterly report pursuant to Section 13 or 15(d)

Debt - Inputs Used In Lattice Model (Details)

v2.4.0.8
Debt - Inputs Used In Lattice Model (Details) (Notes, Notes Due February 1, 2033, USD $)
0 Months Ended 6 Months Ended
Jan. 31, 2013
Rate
Jun. 30, 2014
Rate
Jan. 31, 2013
Notes | Notes Due February 1, 2033
     
Debt Instrument [Line Items]      
Stock price   $ 8.84  
Conversion Rate 141.4827 141.4827  
Conversion Price   $ 7.07 $ 7.07
Maturity date   Feb. 01, 2033  
Risk-free interest rate   1.47%  
Estimated stock volatility   42.00%  
Estimated credit spread   7.17%