Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Stock Options (Details 2)

v2.4.0.6
Stock Options (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2012
Stock Options One [Member]
Dec. 31, 2012
Stock Options Two [Member]
Dec. 31, 2012
Stock Options Three [Member]
Dec. 31, 2012
Stock Options Four [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2011
Minimum [Member]
Dec. 31, 2010
Minimum [Member]
Dec. 31, 2009
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Stock Options One [Member]
Dec. 31, 2012
Minimum [Member]
Stock Options Two [Member]
Dec. 31, 2012
Minimum [Member]
Stock Options Three [Member]
Dec. 31, 2012
Minimum [Member]
Stock Options Four [Member]
Dec. 31, 2012
Maximum [Member]
Dec. 31, 2011
Maximum [Member]
Dec. 31, 2010
Maximum [Member]
Dec. 31, 2009
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Stock Options One [Member]
Dec. 31, 2012
Maximum [Member]
Stock Options Two [Member]
Dec. 31, 2012
Maximum [Member]
Stock Options Three [Member]
Dec. 31, 2012
Maximum [Member]
Stock Options Four [Member]
Exercise Prices                 $ 2.21 $ 9.30 $ 8.27 $ 8.27 $ 2.21 $ 7.82 $ 15.64 $ 23.04 $ 46.87 $ 33.06 $ 33.06 $ 26.15 $ 6.52 $ 13.22 $ 18.78 $ 46.87
Options Outstanding, Number Outstanding 3,315,917       1,723,945 537,478 555,486 499,008                                
Options Outstanding, Weighted-Average Remaining Contractual Life in Years         5 years 4 years 3 months 18 days 4 years 7 months 6 days 5 years                                
Options Outstanding, Weighted-Average Exercise Price $ 11.84 $ 18.59 $ 15.16 $ 14.08 $ 3.49 $ 8.50 $ 16.10 $ 39.53                                
Options Exercisable, Number Exercisable 2,281,298 210,520 441,850   1,621,794 293,745 163,401 202,358                                
Options Exercisable, Weighted-Average Exercise Price $ 7.32 $ 16.44 $ 14.95   $ 3.30 $ 9.07 $ 17.19 $ 29.01                                
Options Outstanding, Aggregate intrinsic value $ 226,509,751                                              
Options Exercisable, Aggregate intrinsic value $ 166,143,813