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Employee Retirement Benefits (Tables)
 12 Months Ended
Jan. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
The accumulated benefit obligation
The accumulated benefit obligation, including the impact of the August 31, 2015 remeasurement resulting from the plan amendment, for these benefits is as follows:
 
 
For the years ended January 31,
 
 
2016
 
2015
 
2014
Benefit obligation at beginning of year
 
$
12,125

 
$
8,254

 
$
8,307

Service cost
 
285

 
195

 
202

Interest cost
 
386

 
366

 
348

Amendments
 
(958
)
 
—

 
—

Actuarial (gain) loss and assumption changes
 
(3,544
)
 
3,543

 
(340
)
Retiree benefits paid
 
(303
)
 
(233
)
 
(263
)
Benefit obligation at end of year
 
$
7,991

 
$
12,125

 
$
8,254

 
 
 
 
 
 
 
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 plan's pre-tax adjustment to accumulated other comprehensive income/loss:
 
 
For the years ended January 31,
 
 
2016
 
2015
 
2014
Amounts not yet recognized in net periodic benefit cost:
 
 
 
 
 
 
Net actuarial loss
 
$
2,504

 
$
6,309

 
$
2,918

Prior service cost
 
(892
)
 
—

 
—

Total pre-tax accumulated other comprehensive loss
 
$
1,612

 
$
6,309

 
$
2,918

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

 
$
2,918

 
$
3,441

Reclassification adjustments recognized in benefit cost:
 
 
 
 
 
 
Recognized net (loss)
 
(261
)
 
(152
)
 
(183
)
Amortization of prior service cost
 
66

 
—

 
—

Amounts recognized in AOCI during the year:
 
 
 
 
 
 
Prior service cost from amendments
 
(958
)
 
—

 
—

Net actuarial (gain) loss
 
(3,544
)
 
3,543

 
(340
)
Pre-tax accumulated other comprehensive loss - end of year related to benefit obligation
 
$
1,612

 
$
6,309

 
$
2,918
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,
 
 
2016
 
2015
 
2014
Beginning liability balance
 
$
12,125

 
$
8,254

 
$
8,307

Net periodic benefit cost
 
866

 
713

 
733

Other comprehensive (income) loss
 
(4,697
)
 
3,391

 
(523
)
Total recognized in net periodic benefit cost and other comprehensive income
 
(3,831
)
 
4,104

 
210

Retiree benefits paid
 
(303
)
 
(233
)
 
(263
)
Ending liability balance
 
$
7,991

 
$
12,125

 
$
8,254

 
 
 
 
 
 
 
Current portion in accrued liabilities
 
$
329

 
$
313

 
$
255

Long-term portion in other liabilities
 
$
7,662

 
$
11,812

 
$
7,999

 
 
 
 
 
 
 
Assumptions used to calculate benefit obligation:
 
 
 
 
 
 
Discount rate
 
4.25
%
 
3.50
%
 
4.50
%
Rate of compensation increase
 
4.00
%
 
4.00
%
 
4.00
%
Health care cost trend rates:
 
 
 
 
 
 
Health care cost trend rate assumed for next year
 
6.83%(a) | 7.00%(b)

 
7.20
%
 
7.70
%
Ultimate health care cost trend rate
 
4.50%(a) | 5.00%(b)

 
5.00
%
 
5.00
%
Year that the rate reaches the ultimate trend rate
 
2030(a) | 2025(b)
 
2025

 
2025

Assumptions used to calculated the net periodic benefit cost:
 
 
 
 
 
 
Discount rate
 
4.25%(a) | 3.50%(b)

 
4.50
%
 
4.25
%
Rate of compensation increase

 
4.00
%
 
4.00
%
 
4.00
%
 
 
 
 
 
 
 
(a) Assumptions used for the five months of fiscal 2016 following the August 31, 2015 remeasurement.
(b) Assumptions used for the seven months of fiscal 2016 prior to the plan amendment triggering the August 31, 2015 remeasurement.
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, 2016
 
 
One-percentage-point increase
 
One-percentage-point decrease
Effect on total of service and interest cost components
 
$
89

 
$
(68
)
Effect on accumulated postretirement benefit obligation
 
$
1,445

 
$
(1,129
)
Schedule of future postretirement other pension benefit payments
The following postretirement other than pension benefit payments, which reflect expected future service as appropriate, are expected to be paid:
Fiscal
2017
 
$
329

Fiscal
2018
 
350

Fiscal
2019
 
352

Fiscal
2020
 
347

Fiscal
2021 - 2025
 
2,299