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Stockholders' Equity - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 06, 2021
Sep. 30, 2021
Stockholders' Equity        
Shares reserved for issuance 19,100,000      
Number of shares counted for grants of full value awards from reserve 1.5      
Number of shares available for grant 994,605      
Remaining number of shares authorized to be repurchased       0
Treasury stock, value, acquired, cost method $ 2,963 $ 4,103    
Common stock surrendered in the exercise of stock options (in shares) 4,678 9,384    
December 6, 2021 Stock Repurchase Plan        
Stockholders' Equity        
Amount yet to be expended under the program $ 17,000   $ 20,000  
Shares repurchased 147,185      
Treasury stock, value, acquired, cost method $ 3,000      
Restricted Stock - Service Based        
Stockholders' Equity        
Shares and options vesting period 4 years      
Stock Option - Service Based        
Stockholders' Equity        
Shares and options vesting period 4 years      
Restricted Stock - Market Based        
Stockholders' Equity        
Shares and options vesting period 4 years      
Stock Option - Market-Based        
Stockholders' Equity        
Shares and options vesting period 4 years      
SARs        
Stockholders' Equity        
Shares issued 0      
Exercised (in shares) 750      
Cash paid to settle stock appreciation rights $ 100      
Canceled (in shares) 2,500      
Outstanding (in shares) 38,795