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Derivative Financial Instruments - Derivative Instruments Measured at Fair Value in Consolidated Balance Sheets (Details) - Designated as Hedging Instrument - USD ($)
$ in Thousands
Jun. 25, 2019
Dec. 25, 2018
Derivatives, Fair Value [Line Items]    
Total derivatives designated as hedging instruments $ 132 $ 1,075
Level 2 | Interest rate cap | Other current assets    
Derivatives, Fair Value [Line Items]    
Total derivatives designated as hedging instruments $ 132 $ 1,075