Retirement Plans (Schedule Of Fair Value Of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 94,383	$ 94,484	$ 76,460
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43,492	32,268
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43,521	62,216
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,370
Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,728	1,431
Cash And Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,728	1,431
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,881
Money Market Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,881
U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,794
U.S. Government Obligations [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,794
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,370
Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,370
Domestic Equities [Member] | Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,324	15,146
Domestic Equities [Member] | Common Stock [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,324	15,146
International Equities [Member] | Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,315	6,622
International Equities [Member] | Common Stock [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,315	6,622
Fixed Income Funds [Member] | Common Collective Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,809	18,563
Fixed Income Funds [Member] | Common Collective Trust Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,809	18,563
Fixed Income Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		659
Fixed Income Funds [Member] | Mutual Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		659
U.S. Equity Funds [Member] | Common Collective Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19,397	27,084
U.S. Equity Funds [Member] | Common Collective Trust Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19,397	27,084
U.S. Equity Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,612	2,072
U.S. Equity Funds [Member] | Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,612	2,072
Balanced Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,162
Balanced Funds [Member] | Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,162
International Equity Funds [Member] | Common Collective Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,464	7,494
International Equity Funds [Member] | Common Collective Trust Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,464
International Equity Funds [Member] | Common Collective Trust Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		7,494
International Equity Funds [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,202	9,738
International Equity Funds [Member] | Mutual Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 7,202	$ 9,738