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Shareholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
May 13, 2021
Equity Class Of Treasury Stock [Line Items]            
Common stock repurchased, shares   122,000 220,731 0 342,731  
Common stock repurchased, value   $ 2,776,000 $ 5,304,000   $ 8,080,000  
Shares available for future purchases   $ 50,000,000     $ 50,000,000  
Antidilutive securities excluded from computation of earnings per share (shares) 93 84,720   46,810 61,780  
Maximum            
Equity Class Of Treasury Stock [Line Items]            
Treasury shares authorized to be purchased           $ 50,000,000