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Employee Retirement Benefits (Tables)
 12 Months Ended
Jan. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
The accumulated benefit obligation
The accumulated benefit obligation for these benefits is as follows:
 
 
For the years ended January 31,
 
 
2015
 
2014
 
2013
Benefit obligation at beginning of year
 
$
8,254

 
$
8,307

 
$
7,560

Service cost
 
195

 
202

 
187

Interest cost
 
366

 
348

 
335

Actuarial loss (gain) and assumption changes
 
3,543

 
(340
)
 
433

Retiree benefits paid
 
(233
)
 
(263
)
 
(208
)
Benefit obligation at end of year
 
$
12,125

 
$
8,254

 
$
8,307
Schedule of pre-tax accumulated other comprehensive income related to benefit obligation and net periodic benefit cost not yet recognized
The following tables set forth the plans' pre-tax adjustment to accumulated other comprehensive income/loss:
 
 
For the years ended January 31,
 
 
2015
 
2014
 
2013
Amounts not yet recognized in net periodic benefit cost:
 
 
 
 
 
 
Net actuarial loss
 
$
6,309

 
$
2,918

 
$
3,441

Total pre-tax accumulated other comprehensive loss
 
$
6,309

 
$
2,918

 
$
3,441

 
 
 
 
 
 
 
Pre-tax accumulated other comprehensive loss - beginning of year related to benefit obligation
 
$
2,918

 
$
3,441

 
$
3,241

Reclassification adjustments recognized in benefit cost:
 
 
 
 
 
 
Recognized net (loss)
 
(152
)
 
(183
)
 
(210
)
Amortization of transition obligation
 
—

 
—

 
(23
)
Amounts recognized in AOCI during the year:
 
 
 
 
 
 
Net actuarial loss (gain)
 
3,543

 
(340
)
 
433

Pre-tax accumulated other comprehensive loss - end of year related to benefit obligation
 
$
6,309

 
$
2,918

 
$
3,441
The liability and expense reflected in the balance sheet and income statement
The liability and net periodic benefit cost reflected in the Consolidated Balance Sheets and Consolidated Statements of Income and Comprehensive Income were as follows:
 
 
For the years ended January 31,
 
 
2015
 
2014
 
2013
Beginning liability balance
 
$
8,254

 
$
8,307

 
$
7,560

Net periodic benefit cost
 
713

 
733

 
755

Other comprehensive loss (income)
 
3,391

 
(523
)
 
200

Total recognized in net and other comprehensive income
 
4,104

 
210

 
955

Retiree benefits paid
 
(233
)
 
(263
)
 
(208
)
Ending liability balance
 
$
12,125

 
$
8,254

 
$
8,307

 
 
 
 
 
 
 
Current portion in accrued liabilities
 
$
313

 
$
255

 
$
235

Long-term portion in other liabilities
 
$
11,812

 
$
7,999

 
$
8,072

 
 
 
 
 
 
 
Assumptions used to calculate benefit obligation:
 
 
 
 
 
 
Discount rate
 
3.50
%
 
4.50
%
 
4.25
%
Wage inflation rate
 
4.00
%
 
4.00
%
 
4.00
%
Health care cost trend rates:
 
 
 
 
 
 
Health care cost trend rate assumed for next year
 
7.20
%
 
7.70
%
 
8.10
%
Ultimate health care cost trend rate
 
5.00
%
 
5.00
%
 
5.00
%
Year that the rate reaches the ultimate trend rate
 
2025

 
2025

 
2025
Effect of one-percentage-point change in assumed health care cost trend rates
The impact of a one-percentage point change in assumed health care rates would have the following effects:
 
 
January 31, 2015
 
 
One-percentage-point increase
 
One-percentage-point decrease
Effect on total of service and interest cost components
 
$
291

 
$
(203
)
Effect on accumulated postretirement benefit obligation
 
$
2,865

 
$
(2,138
)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
The following postretirement other than pension benefit payments, which reflect expected future service as appropriate, are expected to be paid:
Fiscal
2017
 
$
331

Fiscal
2018
 
355

Fiscal
2019
 
370

Fiscal
2020
 
382

Fiscal
2021 - 2025
 
2,170