XML 50 R41.htm IDEA: XBRL DOCUMENT v3.22.1
Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Summary of Option Activity (Details)
 3 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Number of Shares  
Outstanding at beginning of period (in shares) | shares 1,601,250
Granted (in shares) | shares 0
Exercised (in shares) | shares (7,500)
Expired/Forfeited (in shares) | shares 0
Outstanding at end of period (in shares) | shares 1,593,750
Exercisable at end of period (in shares) | shares 1,091,000
Weighted Average Exercise Price per share  
Outstanding at beginning of period (in usd per share) | $ / shares $ 51.73
Granted (in usd per share) | $ / shares 0
Exercised (in usd per share) | $ / shares 41.00
Expired/Forfeited (in usd per share) | $ / shares 0
Outstanding at end of period (in usd per share) | $ / shares 51.78
Exercisable at end of period (in usd per share) | $ / shares $ 53.30
Aggregate Intrinsic Value  
Outstanding at beginning of period | $ $ 4,886,106
Granted | $ 0
Exercised | $ 43,548
Expired/Forfeited | $ 0
Outstanding at end of period | $ 4,486,236
Exercisable at end of period | $ $ 2,069,031