Quarterly report pursuant to Section 13 or 15(d)

Repurchase of Common Stock (Details)

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Repurchase of Common Stock (Details) - USD ($)
1 Months Ended 3 Months Ended
Dec. 29, 2018
Dec. 01, 2018
Nov. 03, 2018
Dec. 29, 2018
Sep. 29, 2018
Class of Stock [Line Items]          
Authorized amount         $ 60,000,000
Shares repurchased (in shares)       92,148  
Stock repurchased during period, value       $ 1,700,000  
Aggregated number of shares repurchased (in shares) 3,449,609     3,449,609  
Aggregated shares repurchased, value $ 49,400,000     $ 49,400,000  
Dollar value of shares that may yet be purchased under the plans $ 10,600,000     $ 10,600,000  
Common Stock          
Class of Stock [Line Items]          
Shares repurchased (in shares) 21,799 21,600 48,749 92,148  
Dollar value of shares that may yet be purchased under the plans $ 10,600,000 $ 11,000,000 $ 11,400,000 $ 10,600,000  
Average price paid per share (usd per share) $ 18.99 $ 18.89 $ 18.24 $ 18.57  
Publicly Announced Plan | Common Stock          
Class of Stock [Line Items]          
Shares repurchased (in shares) 21,799 21,600 48,749 92,148