Defined Benefit Plans (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 18, 2015	Sep. 30, 2015	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 31, 2014
Payments to settle the plans			$ 43,200,000
Net actuarial losses recognized from AOCI			59,700,000
Deferred tax assets associated with pension actuarial losses			23,000,000		$ 23,000,000
Components of net periodic benefit cost
Service cost - administrative costs			500,000	$ 200,000	1,300,000	$ 500,000
Interest costs on benefits obligation			1,400,000	1,500,000	4,200,000	4,500,000
Expected return on assets			(1,200,000)	(1,500,000)	(3,600,000)	(4,500,000)
Net actuarial loss amortization			300,000	300,000	1,100,000	800,000
Settlement charge			59,700,000		59,700,000
Net periodic benefit cost			60,700,000	$ 500,000	62,700,000	1,300,000
Employer contributions					43,800,000	$ 600,000
SERP
Components of net periodic benefit cost
Employer contributions					$ 600,000
Timothy P. Horne
Components of net periodic benefit cost
Consulting service payment (as a percent)	50.00%
Period of annual base salary	3 years
Annual payment for consulting services	$ 400,000
Payments for consulting service as per compensation agreement							$ 598,562
Lump sum buyout of consulting services lifetime payment obligation	$ 6,000,000
Payment for lump-sum buyout of lifetime consulting service payment obligation		$ 6,000,000
Pre-tax charge for lump-sum buyout of lifetime payment obligation			$ 5,000,000