Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Equity (Schedule of Stock Option Activity) (Details)

v3.4.0.3
Equity (Schedule of Stock Option Activity) (Details) - $ / shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Number of Options:    
Balance, beginning 2,449,742  
Granted 481,489  
Exercised (13,820) (91,528)
Forfeited (68,120)  
Balance, ending 2,849,291  
Exercisable 1,082,060  
Weighted Average Exercise Price:    
Balance, beginning $ 39.73  
Granted 23.24  
Exercised 8.86  
Forfeited 41.49  
Balance, ending 37.05  
Exercisable $ 34.32