Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Valuation and Qualifying Accounts [Abstract]
Deferred Tax Assets, Valuation Allowance Beginning of Year	$ 0	$ 30,374	$ 27,423
Valuation Allowances and Reserves, Charged to Cost and Expense	0	0	2,959
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	(8)
Valuation Allowances and Reserves, Deductions	0	(30,374)	0
Deferred Tax Assets, Valuation Allowance, End of Year	$ 0	$ 0	$ 30,374