Restructuring and Other Charges (Changes in Restructuring Liability) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Restructuring Reserve [Roll Forward]
Restructuring and other charges	$ 2,040	$ 7,338	$ 6,394	$ 13,285
Restructuring Reserve	19,327		19,327
Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	1,031	2,860	1,982	4,228
Restructuring Reserve	837		837
Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	44	443	355	1,726
Restructuring Reserve	1,119		1,119
Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	198	156	370	904
Restructuring Reserve	17,371		17,371
Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring and other charges	643	$ 1,304	1,531	$ 2,636
Restructuring Reserve	0		0
2015 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			1,413
Payments for Restructuring			(863)
Restructuring Reserve	550		550
2015 Plan [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			1,344
Payments for Restructuring			(794)
Restructuring Reserve	550		550
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			69
Payments for Restructuring			(69)
Restructuring Reserve	0		0
2014 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,506
Restructuring and other charges			1,624
Payments for Restructuring			(2,855)
Restructuring Reserve	275		275
2014 Plan [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,506
Restructuring and other charges			647
Payments for Restructuring			(1,878)
Restructuring Reserve	275		275
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			0
Payments for Restructuring			0
Restructuring Reserve	0		0
2014 Plan [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			977
Payments for Restructuring			(977)
Restructuring Reserve	0		0
Residual Plans [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			19,431
Restructuring and other charges			512
Payments for Restructuring			(2,057)
Restructuring Reserve	17,886		17,886
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			69
Payments for Restructuring			(231)
Restructuring Reserve	515		515
Residual Plans [Member] | Multi-Employer Pension Withdrawal Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			18,700
Restructuring and other charges			370
Payments for Restructuring			(1,699)
Restructuring Reserve	17,371		17,371
Residual Plans [Member] | Building Clean-up, Equipment Moving and Other Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			0
Restructuring and other charges			127
Payments for Restructuring			(127)
Restructuring Reserve	0		0
Acquisition Integration Plans [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,213
Restructuring and other charges			769
Payments for Restructuring			(1,366)
Restructuring Reserve	616		616
Acquisition Integration Plans [Member] | Employee Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			77
Restructuring and other charges			45
Payments for Restructuring			(110)
Restructuring Reserve	12		12
Acquisition Integration Plans [Member] | Lease Termination Expenses [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			1,136
Restructuring and other charges			286
Payments for Restructuring			(818)
Restructuring Reserve	604		604
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			438
Payments for Restructuring			(438)
Restructuring Reserve	$ 0		$ 0