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	Jan. 03, 2016
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					35.00%
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount					$ (35,357)	$ (70,592)	$ (81,945)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount					(6,451)	(3,767)	(7,234)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount					164,893	0	0
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount					15,964	0	0
Effective Income Tax Rate Reconciliation, Share based Compensation, Excess Tax Benefit, Amount					5,196	0	0
Domestic Tax Planning Initiatives					4,282	0	0
Foreign and U.S. tax effects of foreign operations					2,408	2,278	4,389
Valuation allowances					(35,895)	4,915	(6,075)
Non-deductible goodwill					(15,458)	(6,409)	(7,435)
One-time Transition Tax					(4,446)	0	0
Deferred Tax Liabilities Deemed Repatriation	$ (1,801)				(1,801)	0	0
Non-deductible expenses and other, net					(325)	1,509	4,151
Income tax benefit (provision)	121,649				93,010	$ (72,066)	$ (94,149)
Deferred Tax Assets, Net	16,643				16,643
Valuation Allowances and Reserves, Balance	13,667				13,667
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)
Forecast
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Tax Act
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount					164,893
One-time Transition Tax					(4,446)
Deferred Tax Liabilities Deemed Repatriation	(1,801)				(1,801)
Income tax benefit (provision)					140,379
Tax Credit Carryforward, Valuation Allowance	$ 15,962				15,962
Other Tax Expense (Benefit)					$ 2,305