XML 140 R108.htm IDEA: XBRL DOCUMENT v3.22.0.1
Share-Based Compensation And Share Repurchase Plans (Summary Of Stock Options Outstanding And Exercisable) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Stock Options, Granted 0      
Weighted Average Exercise Price of Options Outstanding, Granted   $ 4.66 $ 16.12  
Weighted Average Remaining Years of Contractual Life 1 year 7 months 28 days 2 years 2 months 4 days 2 years 9 months 14 days 2 years 10 months 17 days
Aggregate Intrinsic Value, Beginning balance $ 13,969 $ 136,350 $ 1,530,528  
Aggregate Intrinsic Value, Exercised $ 63,831   185,175  
Aggregate Intrinsic Value, Ending balance   $ 13,969 $ 136,350 $ 1,530,528
Class A [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Stock Options, Beginning balance 713,479 711,377 586,469  
Number of Stock Options, Granted   38,803 219,408  
Number of Stock Options, Exercised (38,803)   (69,500)  
Number of Stock Options, Expired (157,332) (36,701) (25,000)  
Number of Stock Options Outstanding, Ending balance 517,344 713,479 711,377 586,469
Weighted Average Exercise Price of Options Outstanding, Beginning price $ 14.64 $ 14.74 $ 14.01  
Weighted Average Exercise Price of Options Outstanding, Granted   4.66 16.12  
Weighted Average Exercise Price of Options Outstanding, Exercised 4.66   13.42  
Weighted Average Exercise Price of Options Outstanding, Expired 11.87 14.74 13.42  
Weighted Average Exercise Price of Options Outstanding, Ending price $ 15.42 $ 14.64 $ 14.74 $ 14.01