Employee Benefit Plans (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Change in projected benefit obligation:
Projected benefit obligation at beginning of period		$ 395,142	$ 129,966
Acquisitions		0	199,996
Service cost		6,638	5,208	$ 507
Interest cost		10,536	13,214	5,307
Employee contributions		1,862	1,946
Plan amendments		90	(1,371)
Actuarial loss/(gain)		(24,436)	88,592
Benefits paid		(11,197)	(13,045)
Effect of curtailment		(9,545)	0
Effect of settlement		(162,600)	0
Other		(24,214)	(29,364)
Projected benefit obligation at end of period		182,276	395,142	129,966
Change in plan assets:
Fair value of plan assets at beginning of period		328,220	118,898
Acquisitions		0	171,117
Actual return on plan assets		(17,888)	67,090
Employer contributions		9,612	7,061
Benefits paid		(11,197)	(13,045)
Effect of settlement		(162,600)	0
Other		(20,039)	(24,847)
Fair value of plan assets at end of period		127,970	328,220	118,898
Funded status		(54,306)	(66,922)
Amounts recognized in the consolidated balance sheets consist of:
Noncurrent assets		0	0
Current liability		(1,086)	(993)
Noncurrent liability		(53,220)	(65,929)
Net amount recognized		(54,306)	(66,922)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss		51,921	59,207
Prior service cost/(credit)		359	(1,131)
Net amount recognized	[1]	52,280	58,076
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax		19,700	21,300
Accumulated benefit obligation		171,530	376,043
Net pension cost includes the following components:
Service cost		6,638	5,208	507
Interest cost		10,536	13,214	5,307
Expected return on plan assets		(12,229)	(14,439)	(7,277)
Net amortization and deferral		5,034	2,094	5,261
Curtailment		(1,181)	7	83
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		(2,353)	0	0
Net pension cost		6,445	6,084	3,881
Amounts recognized in accumulated other comprehensive income (loss):
Amortization of actuarial loss		3,115	1,272	3,184
Actuarial (loss)/gain recognized		(2,323)	(22,546)	11,869
Amortization of settlement		3,823	0
Amortization of prior service costs		(31)	14	87
Actuarial prior service cost recognized		0	879
Amortization of curtailment		(853)	0
Other		471	0
Pension adjustments		4,202	$ (20,381)	$ 15,140
Estimated amount that will be amortized from accumulated other comprehensive loss into net periodic pension cost in fiscal 2012:
Net actuarial loss		4,628
Prior service cost		26
Total		$ 4,654
Weighted average assumptions used to determine benefit obligations:
Discount rate		4.13%	2.79%	4.66%
Rate of compensation increase		0.31%	1.82%	3.00%
Weighted average assumptions used to determine net periodic benefit cost for the employee benefit pension plans:
Discount rate		3.47%	4.15%	3.96%
Rate of increase in future compensation levels		0.38%	1.70%	0.00%
Expected long-term rate of return on assets		6.62%	5.06%	7.35%
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
2016		$ 9,434
2017		8,381
2018		8,493
2019		9,394
2020		9,737
Years 2021 – 2025		53,893
Multiemployer Plans [Abstract]
Contributions		3,231	$ 3,302	$ 3,149
Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		76,518
Fair value of plan assets at end of period		78,474	76,518
Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		56,793
Fair value of plan assets at end of period		47,176	56,793
Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		194,909
Fair value of plan assets at end of period		2,320	194,909
Fixed Income, Long Term [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		71,820
Fair value of plan assets at end of period		51,145	71,820
Fixed Income, Long Term [Member] | Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		23,619
Fair value of plan assets at end of period		21,079	23,619
Fixed Income, Long Term [Member] | Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		48,201
Fair value of plan assets at end of period		30,066	48,201
Fixed Income, Long Term [Member] | Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		0	0
Fixed Income, Short Term [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		1,419
Fair value of plan assets at end of period		2,647	1,419
Fixed Income, Short Term [Member] | Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		1,341	0
Fixed Income, Short Term [Member] | Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		1,419
Fair value of plan assets at end of period		1,306	1,419
Fixed Income, Short Term [Member] | Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		0	0
Equity Securities, Domestic [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		41,813
Fair value of plan assets at end of period		43,757	41,813
Equity Securities, Domestic [Member] | Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		35,946
Fair value of plan assets at end of period		34,864	35,946
Equity Securities, Domestic [Member] | Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		5,867
Fair value of plan assets at end of period		8,893	5,867
Equity Securities, Domestic [Member] | Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		0	0
Equity Securities, International [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		18,259
Fair value of plan assets at end of period		22,300	18,259
Equity Securities, International [Member] | Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		16,953
Fair value of plan assets at end of period		21,190	16,953
Equity Securities, International [Member] | Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		1,306
Fair value of plan assets at end of period		1,110	1,306
Equity Securities, International [Member] | Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		0	0
Insurance Contracts [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		194,909
Fair value of plan assets at end of period		8,121	194,909
Insurance Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		0	0
Insurance Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		0
Fair value of plan assets at end of period		5,801	0
Insurance Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Change in plan assets:
Fair value of plan assets at beginning of period		194,909
Fair value of plan assets at end of period		2,320	194,909
Western Conference Of Teamsters Pension Plan [Member]
Multiemployer Plans [Abstract]
Contributions	[2]	1,387	1,384	1,254
Central States, Southeast and Southwest Areas Pension Plan [Member]
Multiemployer Plans [Abstract]
Contributions	[3],[4]	858	876	782
Other Multiemployer Plans [Member]
Multiemployer Plans [Abstract]
Contributions		$ 986	$ 1,042	$ 1,113
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Multiemployer Plan, Contributions To Individual Plan, Percent		5.00%

[1] Amounts do not include deferred taxes of $19.7 million and $21.3 million at January 2, 2016 and January 3, 2015, respectively.

[2] The Company has several plants that participate in the Western Conference of Teamsters Pension Plan under collective bargaining agreements that require minimum funding contributions. Certain of these agreements have expired and are being renegotiated with others having expiration dates through April 1, 2020.

[3] In July 2005 this plan received a 10 year extension from the IRS for amortizing unfunded liabilities.

[4] The Company has several processing plants that participate in the Central States, Southeast and Southwest Areas Pension Plan under collective bargaining agreements that require minimum funding contributions. Certain of these agreements have expired and are being renegotiated with others having expiration dates through August 6, 2018.