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Stockholders' Equity (Narrative) (Details) - USD ($)
3 Months Ended 4 Months Ended 6 Months Ended
Apr. 14, 2019
Apr. 15, 2018
Jan. 20, 2019
Apr. 14, 2019
Apr. 15, 2018
Nov. 30, 2018
Stockholders' Equity Note [Abstract]            
Stock Repurchase Program, Authorized Amount           $ 60,000,000.0
Repurchase of common stock, remaining authorized amount $ 101,000,000     $ 101,000,000    
Payments for Repurchase of Common Stock       $ 14,362,000 $ 100,000,000  
Cash dividends declared per common share $ 0.40 $ 0.40 $ 0.40 $ 0.80 $ 0.80  
Dividends, Common Stock       $ 20,700,000