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Comprehensive Income (Tables)
 12 Months Ended
Dec. 29, 2012
Comprehensive Income [Abstract]  
Schedule of Comprehensive Income (Loss) [Table Text Block]
The components of other comprehensive income (loss) and the related tax impacts for the years ended December 29, 2012, December 31, 2011 and January 1, 2011 are as follows (in thousands):

 
Before-Tax
 
Tax (Expense)
 
Net-of-Tax
 
Amount
 
or Benefit
 
Amount
Year Ended January 1, 2011
 
 
 
 
 
Defined Benefit Pension Plans
 
 
 
 
 
Actuarial (loss)/gain recognized
$
589

 
$
(228
)
 
$
361

Amortization of actuarial loss
3,131

 
(1,214
)
 
1,917

Amortization of prior service costs
111

 
(43
)
 
68

Total defined benefit pension plans
3,831

 
(1,485
)
 
2,346

Natural gas swap derivatives
 
 
 
 
 
Loss reclassified to net income
161

 
(62
)
 
99

Loss recognized in other comprehensive income
(257
)
 
99

 
(158
)
Total natural gas derivatives
(96
)
 
37

 
(59
)
Interest Swap derivatives
 
 
 
 
 
Loss reclassified to net income
1,551

 
(601
)
 
950

Loss recognized in other comprehensive income
(723
)
 
280

 
(443
)
Total interest swap derivatives
828

 
(321
)
 
507

Other comprehensive income
$
4,563

 
$
(1,769
)
 
$
2,794

Year Ended December 31, 2011
 
 
 
 
 
Defined Benefit Pension Plans
 
 
 
 
 
Actuarial (loss)/gain recognized
$
(19,280
)
 
$
7,474

 
$
(11,806
)
Amortization of actuarial loss
2,724

 
(1,056
)
 
1,668

Actuarial prior service cost recognized
(103
)
 
40

 
(63
)
Amortization of prior service costs
90

 
(35
)
 
55

Total defined benefit pension plans
(16,569
)
 
6,423

 
(10,146
)
Natural gas swap derivatives
 
 
 
 
 
Loss reclassified to net income
441

 
(170
)
 
271

Loss recognized in other comprehensive income
(1,229
)
 
476

 
(753
)
Total natural gas derivatives
(788
)
 
306

 
(482
)
Interest Swap derivatives
 
 
 
 
 
Loss reclassified to net income
1,163

 
(451
)
 
712

Other comprehensive income
$
(16,194
)
 
$
6,278

 
$
(9,916
)
Year Ended December 29, 2012
 
 
 
 
 
Defined Benefit Pension Plans
 
 
 
 
 
Actuarial (loss)/gain recognized
$
(6,768
)
 
$
2,623

 
$
(4,145
)
Amortization of actuarial loss
4,756

 
(1,844
)
 
2,912

Amortization of prior service costs
103

 
(39
)
 
64

Total defined benefit pension plans
(1,909
)
 
740

 
(1,169
)
Natural gas swap derivatives
 
 
 
 
 
Loss reclassified to net income
1,267

 
(491
)
 
776

Loss recognized in other comprehensive income
(628
)
 
243

 
(385
)
Total natural gas derivatives
639

 
(248
)
 
391

Corn option derivatives
 
 
 
 
 
Loss recognized in other comprehensive income
317

 
(123
)
 
194

Total corn options
317

 
(123
)
 
194

Interest Swap derivatives
 
 
 
 
 
Loss reclassified to net income
260

 
(101
)
 
159

Other comprehensive income
$
(693
)
 
$
268

 
$
(425
)