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. 30, 2017
Dec. 02, 2017
Nov. 04, 2017
Dec. 30, 2017
Class of Stock [Line Items]        
Authorized amount $ 50,000,000     $ 50,000,000
Shares repurchased (in shares)       145,124
Stock repurchased during period, value       $ 3,000,000
Aggregated number of shares repurchased (in shares) 3,038,611     3,038,611
Aggregated shares repurchased, value $ 41,700,000     $ 41,700,000
Dollar Value of Shares that May Yet Be Purchased Under the Plans $ 8,300,000     $ 8,300,000
Common Stock        
Class of Stock [Line Items]        
Shares repurchased (in shares) 69,599 46,444 29,081 145,124
Average Price Paid per Share (usd per share) $ 20.56 $ 20.67 $ 21.04 $ 20.69
Dollar Value of Shares that May Yet Be Purchased Under the Plans $ 8,300,000 $ 9,700,000 $ 10,700,000 $ 8,300,000
Publicly Announced Plan | Common Stock        
Class of Stock [Line Items]        
Shares repurchased (in shares) 69,599 46,444 29,081 145,124