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Stock Repurchase Program and Cash Dividends (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Aug. 21, 2018
May 22, 2018
Feb. 13, 2018
Aug. 04, 2018
Jul. 29, 2017
Aug. 04, 2018
Jul. 29, 2017
Mar. 16, 2018
Stockholders' Equity                
Cash dividends declared per share $ 0.08 $ 0.08 $ 0.08 $ 0.08 $ 0.08 $ 0.16 $ 0.14  
Stock Repurchase Program                
Stockholders' Equity                
Stock Repurchase Program, Authorized Amount               $ 25.0
Stock Repurchased During Period, Shares           730,812    
Treasury Stock, Value, Acquired, Cost Method           $ 21.0    
Remaining value of shares available for repurchase       $ 4.0   $ 4.0