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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Preferred Stock
Common Stock, $1.00 par value per share
Additional Paid-in Capital
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent
Treasury Stock
Beginning balance at Sep. 30, 2018 $ 1,996,908   $ 0 $ 135,343 $ 1,666,609 $ 1,188,971   $ 8,294 $ (1,002,309)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Accounting standards update [Extensible Enumeration] Accounting Standards Update 2016-13 [Member]                
Net income $ 210,256         210,256      
Other comprehensive income (loss) 6,998             6,998  
Dividends on common stock (63,318)         (63,318)      
Proceeds from stock-based awards 740     39 701        
Stock-based compensation expense 5,265     119 5,146        
Repurchase of stock warrants 0     39 (39)        
Treasury stock purchased (123,854)               (123,854)
Ending balance at Sep. 30, 2019 2,032,995 $ (21,945) 0 135,540 1,672,417 1,335,909 $ (21,945) 15,292 (1,126,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 173,438         173,438      
Other comprehensive income (loss) 1,661             1,661  
Dividends on common stock (66,496)         (66,496)      
Proceeds from stock-based awards 144     8 136        
Stock-based compensation expense 6,469     179 6,290        
Treasury stock purchased (112,133)               (112,133)
Ending balance at Sep. 30, 2020 2,014,133   0 135,727 1,678,843 1,420,906   16,953 (1,238,296)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income 183,615         183,615      
Other comprehensive income (loss) 52,832             52,832  
Issuance of preferred stock, net 293,325   300,000   (6,675)        
Dividends on common stock (65,876)         (65,876)      
Dividends on preferred stock (10,034)         (10,034)      
Proceeds from stock-based awards 339     20 319        
Stock-based compensation expense 6,381     246 6,135        
Treasury stock purchased (348,651)               (348,651)
Ending balance at Sep. 30, 2021 $ 2,126,064   $ 300,000 $ 135,993 $ 1,678,622 $ 1,528,611   $ 69,785 $ (1,586,947)