XML 82 R71.htm IDEA: XBRL DOCUMENT v3.21.1
Stock Based Compensation Plans - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Number of Shares        
Outstanding at beginning of period     68,403  
Granted     7,555  
Exercised (100) (21,861) (1,300) (28,361)
Forfeited or expired     (600)  
Outstanding at end of period 74,058   74,058  
Vested and expected to vest 74,058   74,058  
Exercisable at end of period 42,108   42,108  
Weighted Average Exercise Price        
Outstanding at beginning of period     $ 48.11  
Granted     63.30  
Exercised     40.09  
Forfeited or expired     40.09  
Outstanding at end of period $ 49.86   49.86  
Vested and expected to vest 49.86   49.86  
Outstanding at end of period $ 44.04   $ 44.04  
Weighted Average Remaining Contractual Term (Years)        
Exercisable at end of period     6 years 8 months 12 days  
Vested and expected to vest     6 years 8 months 12 days  
Exercisable at end of period     6 years  
Aggregate Intrinsic Value        
Outstanding at end of period $ 1,260   $ 1,260  
Vested and expected to vest 1,260   1,260  
Exercisable at end of period $ 976   $ 976