Annual report pursuant to Section 13 and 15(d)

Debt (Details 1)

v2.4.0.8
Debt (Details 1) (USD $)
0 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Aug. 29, 2013
Notes [Member]
Notes Due February 1, 2033 [Member]
Jan. 30, 2013
Notes [Member]
Notes Due February 1, 2033 [Member]
Rate
Dec. 31, 2013
Notes [Member]
Notes Due February 1, 2033 [Member]
Rate
Debt Instrument [Line Items]        
Share price (in dollars per share) $ 3.27   $ 6.20 $ 8.44
Conversion Rate   141.4827 141.4827 141.4827
Conversion Price     $ 7.07 $ 7.07
Maturity date     Feb. 01, 2033 Feb. 01, 2033
Risk-free interest rate     1.12% 1.78%
Estimated stock volatility     40.00% 55.00%
Estimated credit spread     9.44% 8.28%