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

Equity (Summary of Stock Options Outstanding) (Details)

v3.3.1.900
Equity (Summary of Stock Options Outstanding) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Options Outstanding, Number Outstanding 2,449,742 1,719,241
Options Outstanding, Weighted-Average Remaining Contractual Life in Years 6 years 1 month 28 days  
Options Outstanding, Weighted-Average Exercise Price $ 39.73 $ 43.89
Options Exercisable, Number Exercisable 1,064,712  
Options Exercisable, Weighted-Average Exercise Price $ 32.58  
Options Outstanding, Aggregate intrinsic value $ 10,009  
Options Exercisable, Aggregate intrinsic value $ 9,532  
$2.21 - $9.32 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of Exercise Prices (Lower) $ 2.21  
Range of Exercise Prices (Upper) $ 9.32  
Options Outstanding, Number Outstanding 499,758  
Options Outstanding, Weighted-Average Remaining Contractual Life in Years 2 years 6 months 29 days  
Options Outstanding, Weighted-Average Exercise Price $ 6.71  
Options Exercisable, Number Exercisable 482,014  
Options Exercisable, Weighted-Average Exercise Price $ 6.71  
$9.33 - $29.53 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of Exercise Prices (Lower) 9.33  
Range of Exercise Prices (Upper) $ 29.53  
Options Outstanding, Number Outstanding 598,957  
Options Outstanding, Weighted-Average Remaining Contractual Life in Years 6 years 2 months 16 days  
Options Outstanding, Weighted-Average Exercise Price $ 22.49  
Options Exercisable, Number Exercisable 242,928  
Options Exercisable, Weighted-Average Exercise Price $ 17.97  
$29.54 - $35.16 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of Exercise Prices (Lower) 29.54  
Range of Exercise Prices (Upper) $ 35.16  
Options Outstanding, Number Outstanding 601,683  
Options Outstanding, Weighted-Average Remaining Contractual Life in Years 8 years 11 months 16 days  
Options Outstanding, Weighted-Average Exercise Price $ 35.16  
Options Exercisable, Number Exercisable  
Options Exercisable, Weighted-Average Exercise Price  
$35.17 - $120.51 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Range of Exercise Prices (Lower) $ 35.17  
Range of Exercise Prices (Upper) $ 120.51  
Options Outstanding, Number Outstanding 749,344  
Options Outstanding, Weighted-Average Remaining Contractual Life in Years 6 years 3 months 7 days  
Options Outstanding, Weighted-Average Exercise Price $ 79.19  
Options Exercisable, Number Exercisable 339,770  
Options Exercisable, Weighted-Average Exercise Price $ 79.71