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Employee benefit plans (Tables)
 12 Months Ended
Dec. 30, 2011
Employee benefit plans [Abstract]  
Schedule of net pension costs
Our net pension (income) cost related to our defined benefit plans was $(0.8) million, $1.1 million and $9.5 million in the years ended December 30, 2011, December 31, 2010 and December 25, 2009, respectively, which included the following components (in thousands):
 
     
2011
     
2010
     
2009
 
Service cost
 
$
38
   
$
296
   
$
1,120
 
Interest cost
   
1,811
     
1,860
     
2,327
 
Expected return on plan assets
   
(2,496
)
   
(2,290
)
   
(1,948
)
Amortization of transition obligation
   
5
     
5
     
5
 
Amortization of prior service costs
   
3
     
17
     
120
 
Recognized actuarial losses (gains)
   
(26)
     
--
     
52
 
Curtailment gains
   
(152
)
   
(1,031
)
   
(949
)
Special termination benefits
   
--
     
2,225
     
8,820
 
Net periodic pension (income) cost
 
$
(817
)
 
$
1,082
   
$
9,547
 

Schedule of changes in benefit obligations and fair value of plan assets
The financial status of our defined benefit plans at December 30, 2011 and December 31, 2010 was as follows (in thousands):

 
 
2011
 
 
2010
 
Change in benefit obligation:
 
 
 
 
 
 
Projected benefit obligation at beginning of year
 
$
        34,628
 
 
$
45,201
 
Service cost
 
 
38
 
 
 
296
 
Interest cost
 
 
1,811
 
 
 
1,860
 
Actuarial losses
 
 
3,699
 
 
 
2,048
 
Benefits paid
 
 
(1,934
)
 
 
(2,265
)
Plan amendments/settlements
 
 
--
 
 
 
(13,631
)
Plan curtailments
 
 
(47
)
 
 
(1,106
)
Special termination benefits
 
 
--
 
 
 
2,225
 
 
 
 
 
 
 
 
 
 
Projected benefit obligation at end of year
 
$
38,195
 
 
$
34,628
 
 
Change in fair value of plan assets:
 
 
 
 
 
 
   
Fair value of plan assets at beginning of year
 
$
32,459
 
 
$
29,749
 
 
 
 
 
 
 
 
 
 
Actual return on plan assets
 
 
2,880
 
 
 
4,591
 
Employer contributions
 
 
164
 
 
 
14,015
 
Benefits paid
 
 
(1,934
)
 
 
(2,265
)
Plan settlements
 
 
--
 
 
 
(13,631
)
 
 
 
 
 
 
 
 
 
Fair value of plan assets at end of year
 
$
33,569
 
 
$
32,459
 
 
 
 
 
 
 
 
 
 
Amounts recognized on the Consolidated Balance Sheets:
               
Non-current assets
 
$
181
   
$
101
 
Non-current liabilities
   
(4,807
)
   
(2,270)
 
Net amount recorded
 
$
(4,626
)
 
$
(2,169)
 
 
Schedule of accumulated other comprehensive income regarding defined benefit plans
The unrecognized components of our net periodic pension costs have been included in accumulated other comprehensive income.  For the years ended December 30, 2011 and December 31, 2010, the accumulated other comprehensive income for our defined benefit plans included the following components (in thousands):
 
 
 
2011
 
 
2010
 
Actuarial (losses) gains
 
$
(3,096
)
 
$
273
 
Plan curtailment
   
(84
)
   
--
 
Amortization of prior service costs
 
 
(21
)
 
 
(7
)
Amortization of transition obligations
 
 
(10
)
 
 
(14
)
Accumulated other comprehensive income
 
$
(3,211
)
 
$
252
 
 
Schedule of benefit obligations in excess of plan assets
The aggregate benefit obligation, accumulated benefit obligation and fair value of plan assets for plans with benefit obligations in excess of plan assets as of December 30, 2011 and December 31, 2010 were as follows (in thousands):
 
 
 
2011
 
 
2010
 
Projected benefit obligation
 
$
37,833
 
 
$
34,190
 
Accumulated benefit obligation
 
$
37,725
 
 
$
34,017
 
Plan assets
 
$
33,026
 
 
$
31,979
 
 
Schedule of defined benefit plans' weighted-average asset allocations
The defined benefit plans' weighted-average asset allocations at December 30, 2011 and December 31, 2010 were as follows:
 
Asset category:
 
2011
 
 
2010
 
Equity securities
 
 
10
%
 
 
69
%
Fixed income securities
 
 
88
%
 
 
30
%
Other
 
 
2
%
 
 
1
%
Total
 
 
100
%
 
 
100
%
 
Schedule of plan assets measured and recorded at fair value on a recurring basis per asset category
A summary of our pension assets that are measured and recorded at fair value on a recurring basis and their level within the fair value hierarchy as of December 30, 2011 are as follows (in millions):
 
 
 
 
 
 
 
 2011
 
 
Quoted Prices
In Active
 Markets for
 Identical Assets
(Level 1)
 
 
Significant
 Other
 Observable
 Inputs
(Level 2)
 
 
Significant
Unobservable
Inputs
(Level 3)
 
Plan assets per asset category (1):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
0.1
 
 
$
0.1
 
 
$
--
 
 
$
--
 
Fixed income securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds (3)
 
 
29.1
 
 
 
29.1
 
 
 
--
 
 
 
--
 
Short-term debt securities (4)
 
 
1.0
 
 
 
1.0
 
 
 
--
 
 
 
--
 
Equity securities:
 
 
 
 
 
 
 
 
 
 
--
 
 
 
--
 
International small-cap value (5)
 
 
 1.0
 
 
 
 1.0
 
 
 
 
 
 
 
 
 
International mid-cap value (6)
 
 
1.9
 
 
 
1.9
 
 
 
--
 
 
 
--
 
International diversified value (7)
 
 
0.5
 
 
 
0.5
 
 
 
--
 
 
 
--
 
 
 
 
 
 
 
 
 
 
 
 
--
 
 
 
--
 
Fair value of plan assets
 
$
33.6
 
 
$
33.6
 
 
$
--
 
 
$
--
 
 
A summary of our pension assets that are measured and recorded at fair value on a recurring basis and their level within the fair value hierarchy as of December 31, 2010 are as follows (in millions):
 
 
 
 
 
 
 
 2010
 
 
Quoted Prices
In Active Markets for
Identical Assets
(Level 1)
 
 
Significant
Other
Observable
Inputs
(Level 2)
 
 
Significant
Unobservable
Inputs
 (Level 3)
 
Plan assets per asset category (1):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
0.1
 
 
$
0.1
 
 
$
--
 
 
$
--
 
Fixed income securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Treasuries (2)
 
 
2.4
 
 
 
2.4
 
 
 
--
 
 
 
--
 
Corporate bonds (3)
 
 
7.1
 
 
 
7.1
 
 
 
--
 
 
 
--
 
Short-term debt securities (4)
 
 
1.0
 
 
 
1.0
 
 
 
--
 
 
 
--
 
Equity securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
International small-cap value (5)
 
 
6.2
 
 
 
6.2
 
 
 
--
 
 
 
--
 
International mid-cap value (6)
 
 
12.5
 
 
 
12.5
 
 
 
--
 
 
 
--
 
International diversified value (7)
 
 
3.2
 
 
 
3.2
 
 
 
--
 
 
 
--
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair value of plan assets
 
$
32.5
 
 
$
32.5
 
 
$
--
 
 
$
--
 
 
(1)
See Note 15, Financial instruments, for a description of the three levels within the fair value hierarchy.
(2)
Debt securities that invest in treasury and other related instruments.
(3)
Debt securities that specialize in investment grade bonds of institutional investors and other treasury related securities.
(4)
Generally, money market securities that maintain cash for interim purchases.
(5)
Equity securities that focus on international public companies with low market capitalization.
(6)
Equity securities that focus on international public companies with a mid-rated market capitalization.
(7)
Equity securities that focus on international public companies, but diversify their market capitalization to limit investment.
 
Schedule of assumptions used for defined benefit plan
 
The assumptions used to develop our defined benefit plan data were as follows:
 
 
 
2011
 
 
2010
 
Discount rate
 
 
4.60
%
 
 
5.40
%
Annual compensation increases
 
 
N/A
 
 
 
4.25
%
Expected long-term rates of return on plan assets
 
 
8.00
%
 
 
8.00
%
 
Schedule of expected benefit payments
 
The following table shows our expected benefit payments for the next five fiscal years and the aggregate five years thereafter from our defined benefit plans (in thousands):
 
Year Ending
 
 
 
2012
 
$
1,975
 
2013
 
$
2,022
 
2014
 
$
2,029
 
2015
 
$
2,077
 
2016
 
$
2,160
 
Thereafter
 
$
27,932