Retirement Plans (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Oct. 02, 2016	Oct. 02, 2016	Sep. 27, 2015	Sep. 28, 2014	Jan. 01, 2016
Defined Benefit Plan Disclosure [Line Items]
Minimum Required Contribution For Retirement Plans						$ 0
Decrease in earnings before income taxes due to quarter percentage point decrease in discount rate			$ 500,000
Decrease in earnings before income taxes due to quarter percentage point decrease in long-term rate of return			$ 800,000
Qualified Defined Contribution Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans, General Information			P21Y
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%	4.00%
Defined Contribution Plan, Cost Recognized			$ 3,800,000	$ 1,200,000	$ 1,000,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%	100.00%
Non-Qualified Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Period of years in executive position			10 years
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%		4.00%
Defined Contribution Plan, Cost Recognized			$ 300,000	$ 1,300,000	$ 1,100,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			50.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent of Bonus			85.00%
Vesting percentage of participant's right to company contribution			25.00%
Maximum [Member] | Non-Qualified Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		4.00%