Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) - USD ($)
12 Months Ended 23 Months Ended
Dec. 31, 2017
Dec. 25, 2016
Dec. 27, 2015
Dec. 31, 2017
Feb. 11, 2016
Feb. 11, 2015
Stockholders' Equity Note [Abstract]            
Amount authorized for repurchase of common stock         $ 100,000,000 $ 100,000,000
Shares repurchased 0   556,049 940,034    
Average purchase price (in dollars per share)     $ 71.93 $ 49.02    
Aggregate price of shares repurchased   $ 46,078,000 $ 40,009,000 $ 46,100,000