Restructuring and Other Charges (Changes in Restructuring Liability) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Restructuring Reserve [Roll Forward]
Restructuring and other charges	$ 5,483	$ 5,396	$ 11,529	$ 18,138
Restructuring Reserve	22,320		22,320
Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	723	2,673	2,358	6,386
Restructuring Reserve	571		571
Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	36	323	391	2,021
Restructuring Reserve	1,022		1,022
Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	4,204	171	4,574	1,075
Restructuring Reserve	20,727		20,727
Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	395	$ 1,753	1,925	$ 4,389
Restructuring Reserve	0		0
2015 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			2,259
Payments for Restructuring			(1,741)
Restructuring Reserve	518		518
2015 Plan [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			1,859
Payments for Restructuring			(1,341)
Restructuring Reserve	518		518
2015 Plan [Member] | Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			0
Payments for Restructuring			0
Restructuring Reserve	0		0
2015 Plan [Member] | Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			0
Payments for Restructuring			0
Restructuring Reserve	0		0
2015 Plan [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			400
Payments for Restructuring			(400)
Restructuring Reserve	0		0
2014 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,506
Restructuring and other charges			5,503
Payments for Restructuring			(2,979)
Restructuring Reserve	4,030		4,030
2014 Plan [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,506
Restructuring and other charges			507
Payments for Restructuring			(1,960)
Restructuring Reserve	53		53
2014 Plan [Member] | Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			0
Payments for Restructuring			0
Restructuring Reserve	0		0
2014 Plan [Member] | Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			3,977
Payments for Restructuring			0
Restructuring Reserve	3,977		3,977
2014 Plan [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			1,019
Payments for Restructuring			(1,019)
Restructuring Reserve	0		0
Residual Plans [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			19,431
Restructuring and other charges			833
Payments for Restructuring			(3,052)
Restructuring Reserve	17,212		17,212
Residual Plans [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			54
Restructuring and other charges			(54)
Payments for Restructuring			0
Restructuring Reserve	0		0
Residual Plans [Member] | Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			677
Restructuring and other charges			105
Payments for Restructuring			(320)
Restructuring Reserve	462		462
Residual Plans [Member] | Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			18,700
Restructuring and other charges			597
Payments for Restructuring			(2,547)
Restructuring Reserve	16,750		16,750
Residual Plans [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			185
Payments for Restructuring			(185)
Restructuring Reserve	0		0
Acquisition Integration Plans [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,213
Restructuring and other charges			858
Payments for Restructuring			(1,511)
Restructuring Reserve	560		560
Acquisition Integration Plans [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			77
Restructuring and other charges			45
Payments for Restructuring			(122)
Restructuring Reserve	0		0
Acquisition Integration Plans [Member] | Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,136
Restructuring and other charges			286
Payments for Restructuring			(862)
Restructuring Reserve	560		560
Acquisition Integration Plans [Member] | Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			0
Payments for Restructuring			0
Restructuring Reserve	0		0
Acquisition Integration Plans [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			527
Payments for Restructuring			(527)
Restructuring Reserve	$ 0		$ 0