Employee Benefit Plans (Schedule of Changes in Fair Value of Plan Assets, Pension Plans) (Details) (Pension Plans, Defined Benefit, USD $) In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 413,021	$ 393,460
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,971	4,458
Equity Securities, U.S. Large-cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,602	34,127
Equity Securities, International large-cap value[Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,202	27,595
Equity Securities, Emerging Markets Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,010	12,517
Equity Securities, Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	77,432	73,796
Equity Securities, Domestic Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,860	2,471
Equity Securities, Commodity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,423	8,179
Foreign Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,025	18,344
Fixed Income Funds, Corporate Debt Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	147,834	132,828
Fixed Income Funds, Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,164	22,619
Fixed Income Funds, High Yield Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,614	6,170
Other Types of Investments, Multi-strategy hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,332	22,689
Other Types of Investments, Venture Capital Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	8
Other Types of Investments, Non U.S. Government Index Linked Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31,551	27,659
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	139,495	140,732
Fair Value, Inputs, Level 1 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,971	4,458
Fair Value, Inputs, Level 1 [Member] | Equity Securities, U.S. Large-cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,602	34,127
Fair Value, Inputs, Level 1 [Member] | Equity Securities, International large-cap value[Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,202	27,595
Fair Value, Inputs, Level 1 [Member] | Equity Securities, Emerging Markets Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,010	12,517
Fair Value, Inputs, Level 1 [Member] | Equity Securities, Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 [Member] | Equity Securities, Domestic Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,860	2,471
Fair Value, Inputs, Level 1 [Member] | Equity Securities, Commodity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,423	8,179
Fair Value, Inputs, Level 1 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds, Corporate Debt Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	53,813	45,215
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds, Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds, High Yield Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,614	6,170
Fair Value, Inputs, Level 1 [Member] | Other Types of Investments, Multi-strategy hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 [Member] | Other Types of Investments, Venture Capital Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 1 [Member] | Other Types of Investments, Non U.S. Government Index Linked Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	250,193	230,031
Fair Value, Inputs, Level 2 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities, U.S. Large-cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities, International large-cap value[Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities, Emerging Markets Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities, Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	77,432	73,796
Fair Value, Inputs, Level 2 [Member] | Equity Securities, Domestic Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Equity Securities, Commodity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22,025	18,344
Fair Value, Inputs, Level 2 [Member] | Fixed Income Funds, Corporate Debt Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	94,021	87,613
Fair Value, Inputs, Level 2 [Member] | Fixed Income Funds, Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,164	22,619
Fair Value, Inputs, Level 2 [Member] | Fixed Income Funds, High Yield Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Other Types of Investments, Multi-strategy hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Other Types of Investments, Venture Capital Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 2 [Member] | Other Types of Investments, Non U.S. Government Index Linked Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	31,551	27,659
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,333	22,697	20,431	19,292
Fair Value, Inputs, Level 3 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, U.S. Large-cap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, International large-cap value[Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, Emerging Markets Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, Equity Index Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, Domestic Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities, Commodity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Foreign Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds, Corporate Debt Instruments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds, Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Fixed Income Funds, High Yield Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fair Value, Inputs, Level 3 [Member] | Other Types of Investments, Multi-strategy hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	23,332	22,689	20,262	19,285
Fair Value, Inputs, Level 3 [Member] | Other Types of Investments, Venture Capital Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	8	7	7
Fair Value, Inputs, Level 3 [Member] | Other Types of Investments, Non U.S. Government Index Linked Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0