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Employee Retirement Benefits (Tables)
 12 Months Ended
Jan. 31, 2014
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,
 
 
2014
 
2013
 
2012
Benefit obligation at beginning of year
 
$
8,307

 
$
7,560

 
$
5,969

Service cost
 
202

 
187

 
121

Interest cost
 
348

 
335

 
334

Actuarial (gain) loss and assumption changes
 
(340
)
 
433

 
1,363

Retiree benefits paid
 
(263
)
 
(208
)
 
(227
)
Benefit obligation at end of year
 
$
8,254

 
$
8,307

 
$
7,560
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,
 
 
2014
 
2013
 
2012
Amounts not yet recognized in net periodic benefit cost:
 
 
 
 
 
 
Net actuarial loss
 
$
2,918

 
$
3,441

 
$
3,218

Transition obligation
 
—

 
—

 
23

Total pre-tax accumulated other comprehensive loss
 
$
2,918

 
$
3,441

 
$
3,241

 
 
 
 
 
 
 
Pre-tax accumulated other comprehensive loss - beginning of year related to benefit obligation
 
$
3,441

 
$
3,241

 
$
1,957

Reclassification adjustments recognized in benefit cost:
 
 
 
 
 
 
Recognized net (loss)
 
(183
)
 
(210
)
 
(104
)
Amortization of transition obligation
 
—

 
(23
)
 
(23
)
Amounts recognized in AOCI during the year:
 
 
 
 
 
 
Net actuarial (gain) loss
 
(340
)
 
433

 
1,411

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

 
$
3,441

 
$
3,241
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,
 
 
2014
 
2013
 
2012
Beginning liability balance
 
$
8,307

 
$
7,560

 
$
5,969

Net periodic benefit cost
 
733

 
755

 
582

Other comprehensive (income) loss
 
(523
)
 
200

 
1,236

Total recognized in net and other comprehensive income
 
210

 
955

 
1,818

Retiree benefits paid
 
(263
)
 
(208
)
 
(227
)
Ending liability balance
 
$
8,254

 
$
8,307

 
$
7,560

 
 
 
 
 
 
 
Current portion in accrued liabilities
 
$
255

 
$
235

 
$
212

Long-term portion in other liabilities
 
$
7,999

 
$
8,072

 
$
7,348

 
 
 
 
 
 
 
Assumptions used to calculate benefit obligation:
 
 
 
 
 
 
Discount rate
 
4.50
%
 
4.25
%
 
4.50
%
Wage inflation rate
 
4.00
%
 
4.00
%
 
4.00
%
Health care cost trend rates:
 
 
 
 
 
 
Health care cost trend rate assumed for next year
 
7.70
%
 
8.10
%
 
8.60
%
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, 2014
 
 
One-percentage-point increase
 
One-percentage-point decrease
Effect on total of service and interest cost components
 
$
145

 
$
(107
)
Effect on accumulated postretirement benefit obligation
 
$
1,542

 
$
(1,198
)