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Stock Repurchase Program (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2017
Sep. 27, 2016
Sep. 26, 2017
Sep. 27, 2016
May 22, 2014
Stock Repurchase Program          
Repurchase of common stock authorized by board of directors         $ 100,000
Amount remaining under authorized stock repurchase program $ 69,900   $ 69,900    
Payments to repurchase common stock $ 0 $ 0 $ 0 $ 4,110  
Number of shares repurchased       114,700