XML 29 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8
Senior Convertible Notes (Details Textual) (USD $)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Jun. 30, 2011
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2011
Dec. 31, 2013
Senior Convertible Notes (Textual) [Abstract]              
Debt Instrument, convertible carrying amount $ 49,300,000     $ 49,300,000   $ 49,300,000  
2.75% Senior Convertible Notes due 2017 [Member]
              
Senior Convertible Notes (Textual) [Abstract]              
Interest rate on convertible notes     2.75%        
Principal amount of senior convertible notes 402,500,000   402,500,000 402,500,000     402,500,000
Net proceeds of unsecured senior convertible notes     359,200,000        
Debt instrument, maturity date     Jul. 01, 2017        
Initial conversion rate adjustment Shares     23.7344        
Base principal amount per note     1,000        
Initial conversion price of convertible notes     $ 42.13        
Business day period           5 days  
Fair value of debt conversion cost           88,900,000  
Debt discount, interest rate           8.00%  
Contractual Coupon Interest Expense 2,800,000 2,800,000   8,300,000 8,300,000    
Amortization of Debt Discount (Premium) 3,700,000 3,400,000   10,900,000 10,100,000    
Number of common stock to be purchased           9,553,096  
Initial stock price at which shares to be purchased           $ 42.13  
Cost of hedge transaction           80,100,000  
Number of warrants to be acquired           477,654  
Initial strike price at which Warrants to be acquired           988.51  
Number of common stock shares preferred stock convertible into           20  
Number Of Securities Called By Warrant Transaction           9,553,080  
Cash proceeds from the sale of warrants           $ 47,900,000  
Minimum [Member] | 2.75% Senior Convertible Notes due 2017 [Member]
              
Senior Convertible Notes (Textual) [Abstract]              
Consecutive trading days immediately preceding calendar quarter           20 days  
Percentage of conversion price           130.00%  
Maximum [Member] | 2.75% Senior Convertible Notes due 2017 [Member]
              
Senior Convertible Notes (Textual) [Abstract]              
Consecutive trading days immediately preceding calendar quarter           30 days  
Percentage of conversion price           98.00%