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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Paid-in Capital
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Balance, beginning of period at Sep. 30, 2019 $ 2,032,995 $ (21,945) $ 135,540 $ 1,672,417 $ 1,335,909 $ (21,945) $ 15,292 $ (1,126,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 67,866       67,866      
Other comprehensive income (loss) 694           694  
Dividends on common stock (16,433)       (16,433)      
Proceeds from stock-based awards 50   3 47        
Stock-based compensation expense 1,379   177 1,202        
Treasury stock acquired (33,479)             (33,479)
Balance, end of period at Dec. 31, 2019 2,031,127   135,720 1,673,666 1,365,397   15,986 (1,159,642)
Balance, beginning of period at Sep. 30, 2020 2,014,133   135,727 1,678,843 1,420,906   16,953 (1,238,296)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 38,951       38,951      
Other comprehensive income (loss) 24,482           24,482  
Dividends on common stock (16,577)       (16,577)      
Proceeds from stock-based awards 30   2 28        
Stock-based compensation expense 1,449   209 1,240        
Treasury stock acquired (701)             (701)
Balance, end of period at Dec. 31, 2020 $ 2,061,767   $ 135,938 $ 1,680,111 $ 1,443,280   $ 41,435 $ (1,238,997)