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Income Taxes (Details 3) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Income Tax Disclosure [Abstract]      
Balance beginning of year $ 115,090 $ 97,904 $ 77,495
Additions based on tax positions related to prior years 8,564 489 89
Reductions based on tax positions related to prior years 983 (940) (1,671)
Additions based on tax positions related to current period 26,295 28,859 29,019
Reductions related to settlements with tax authorities (134) (364)
Expiration of statute of limitations 18,168 (11,088) (6,664)
Balance at end of year $ 130,798 $ 115,090 $ 97,904