Employee Benefits (Details) shares in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Mar. 31, 2017 shares	Mar. 31, 2016 shares	Dec. 30, 2017 USD ($) Plan	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of defined contribution retirement plans | Plan			2
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 3,290	$ 1,938	$ 2,757
Defined Contribution Benefit Plan Supplemental Pension Benefits Amount			$ 328	369	416
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			100.00%
Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP | shares	16,241	44,509
Employee Stock Ownership Plan (ESOP), Compensation Expense			$ 1,016	567	1,432
Defined Benefit Contribution Plan Foreign Operations Expenses Recognized			$ 166	$ 199	$ 336
United Kingdom [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Stock Issued During Period, Shares, Employee Stock Ownership Plan | shares	775	3,547
Germany [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Stock Issued During Period, Shares, Employee Stock Ownership Plan | shares		2,561