Income Taxes Income Taxes Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2017	Jul. 03, 2016	Apr. 03, 2016	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Effective Income Tax Rate Reconciliation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	35.00%	35.00%
Income tax provision at the U.S. Federal statutory rate				$ (120,732)	$ (35,357)	$ (70,592)
State income tax provision, net of U.S. Federal income tax effect				(221)	(6,451)	(3,767)
Federal rate change				0	164,893	0
Prior years' tax matters				(9,970)	15,964	0
Excess tax benefits from share-based compensation				10,250	5,196	0
Domestic tax planning initiatives				0	4,282	0
Foreign and U.S. tax effects of foreign operations				(856)	2,408	2,278
Valuation allowances				5,120	(35,895)	4,915
Non-deductible goodwill				(41)	(15,458)	(6,409)
Transition Tax				0	(4,446)	0
Unrepatriated earnings				(326)	(1,801)	0
Non-deductible expenses and other, net				1,975	(325)	1,509
Income tax benefit (provision)	$ 121,649			(114,801)	93,010	(72,066)
Current State and Local Tax Expense (Benefit)				2,661	4,055	5,805
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ (5,120)	35,895	$ (5,697)
Deferred Tax Assets, Net	16,643				$ 16,643
Quantifying Misstatement in Current Year Financial Statements, Amount			$ (2,878)
Quantifying Misstatement in Current Year Financial Statements, Federal Amount		$ (3,837)
Quantifying Misstatement in Current Year Financial Statements, State Amount		$ (398)
Tax Act
Effective Income Tax Rate Reconciliation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	35.00%
Federal rate change				$ (2,426)	$ 164,893
Prior years' tax matters				(9,542)
Transition Tax					(4,446)
Unrepatriated earnings					(1,801)
Income tax benefit (provision)				(2,159)	140,379
Nondeductible expense related to certain executive compensation				(991)
Current State and Local Tax Expense (Benefit)				28
Tax Credit, Foreign, Amount				1,286
Tax Credit Carryforward, Valuation Allowance	$ 15,962				15,962
Other Tax Expense (Benefit)					2,305
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ (7,535)
Prior Year Tax Matters
Effective Income Tax Rate Reconciliation
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount					$ 13,667