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Quarterly Results of Operations (Unaudited) - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 26, 2018
Sep. 26, 2018
Jun. 27, 2018
Mar. 28, 2018
Dec. 27, 2017
Sep. 27, 2017
Jun. 28, 2017
Mar. 29, 2017
Dec. 26, 2018
Dec. 27, 2017
Dec. 28, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Provision (benefit) for income taxes ($) $ (8,410) $ 2,388 $ 865 $ 1,949 $ (4,757) $ (2,457) $ 4,244 $ 3,467 $ (3,208) $ 497 $ 12,783
Tax Cuts and Jobs Act of 2017, decrease in deferred tax liability         $ 1,400            
TRA tax benefit                   $ 2,000  
Anti-dilutive securities not considered in diluted EPS calculation (shares) 0         0     2,593,104 747,985 468,705
Legal settlements $ 36,300               $ 36,258 $ 0 $ 0